Achievements & Publications

Tracking Star-forming Cores as Mass Reservoirs in Clustered and Isolated Regions Using Numerical Passive Tracer Particles

Image

Nozaki, Shingo,   Fukushima, Hajime,   Tokuda, Kazuki,   Machida, Masahiro N.

Understanding the physical properties of star-forming cores as mass reservoirs for protostars and the impact of turbulence is crucial in star formation studies. We implemented passive tracer particles in clump-scale numerical simulations with turbulence strengths of . Unlike core identification methods used in observational studies, we identified 260 star-forming cores...

Cold gas bubble inflated by a low-luminosity radio jet

Image

Murthy, Suma,   Morganti, Raffaella,   Oosterloo, Tom,   Mukherjee, Dipanjan,   Bayram, Suude,   Guillard, Pierre

We present NOEMA CO(2–1) observations of a nearby, young, low-luminosity radio source, B2 0258+35. Our earlier CO(1–0) study had shown the presence of strong jet- ISM interaction and a massive molecular gas outflow involving 75% of the circumnuclear gas. Our follow-up CO(2–1) observations have revealed even more complex gas kinematics,...

Detection of the [O I] 63 μm emission line from the z = 6.04 quasar J2054-0005

Image

Ishii, Nozomi,   Hashimoto, Takuya,   Ferkinhoff, Carl,   Rybak, Matus,   Inoue, Akio K.,   Michiyama, Tomonari

We report the highest-redshift detection of [O I] 63 μm from a luminous quasar, J2054-0005, at z = 6.04 based on the Atacama Large Millimeter/sub-millimeter Array (ALMA) Band 9 observations. The [O I] 63 μm line luminosity is (4.51.5) × 109L⊙, corresponding to the [O I] 63 μm-to-far- infrared luminosity...

The structure of the stellar halo of the Andromeda galaxy explored with the NB515 for Subaru/HSC - I. New insights on the stellar halo up to 120 kpc

Image

Ogami, Itsuki,   Tanaka, Mikito,   Komiyama, Yutaka,   Chiba, Masashi,   Guhathakurta, Puragra,   Kirby, Evan N.

We analyse the M31 halo and its substructure within a projected radius of 120 kpc using a combination of Subaru/HSC NB515 and Canada France Hawaii Telescope/MegaCam g and i bands. We succeed in separating M31’s halo stars from foreground contamination with ~90 per cent accuracy by using the surface gravity...

Survey of non-thermal electrons around supermassive black holes through polarization flips

Image

Tsunetoe, Yuh,   Kawashima, Tomohisa,   Ohsuga, Ken,   Mineshige, Shin

Optically thick non-thermal synchrotron sources notably produce linear polarization vectors that are parallel to projected magnetic field lines on the observer’s screen, although they are perpendicular in well-known optically thin cases. To elucidate the complex relationship between the vectors and fields, and to investigate the energy and spatial distribution of...

Impact of the Lyα radiation force on super-Eddington accretion on to a massive black hole

Image

Mushano, Takuya,   Ogawa, Takumi,   Ohsuga, Ken,   Yajima, Hidenobu,   Omukai, Kazuyuki

The viability of super-Eddington accretion remains a topic of intense debate, crucial for understanding the formation of supermassive black holes in the early universe. However, the impact of the Lyα radiation force on this issue remains poorly understood. We investigate the propagation of the Lyα photons and evaluate the Lyα...

Cosmological evolution of dark matter subhaloes under tidal stripping by growing Milky Way-like galaxies

Image

Kazuno, Yudai,   Mori, Masao,   Kaneda, Yuka,   Otaki, Koki

We present the findings of a comprehensive and detailed analysis of merger tree data from ultra-high-resolution cosmological N-body simulations. The analysis, conducted with a particle mass resolution of 5 × 103 h-1 M⊙ and a halo mass resolution of 107 h-1 M⊙, provides sufficient accuracy to suppress numerical artefacts. This...

GR-RMHD Simulations of Super-Eddington Accretion Flows onto a Neutron Star with Dipole and Quadrupole Magnetic Fields

Image

Inoue, Akihiro,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Asahina, Yuta,   Middleton, Matthew J.

Although ultraluminous X-ray pulsars (ULXPs) are believed to be powered by super-Eddington accretion onto a magnetized neutron star (NS), the detailed structures of the inflow–outflow and magnetic fields are still not well understood. We perform general relativistic radiation magnetohydrodynamics (GR-RMHD) simulations of super-Eddington accretion flows onto a magnetized NS with...

Dynamics of a Galaxy at z > 10 Explored by JWST Integral Field Spectroscopy: Hints of Rotating Disk Suggesting Weak Feedback

Image

Xu, Yi,   Ouchi, Masami,   Yajima, Hidenobu,   Fukushima, Hajime,   Harikane, Yuichi,   Isobe, Yuki

We investigate the dynamics of GN-z11, a luminous galaxy at z = 10.60, carefully analyzing the public deep integral field spectroscopy (IFS) data taken with the JWST NIRSpec integral field unit. While the observations of the IFS data originally targeted an He II clump near GN-z11, we find that the...

Radiation and outflow properties of super-Eddington accretion flows around various mass classes of black holes: Dependence on the accretion rates

Image

Yoshioka, Shogo,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa,   Kitaki, Takaaki

We perform axisymmetric two-dimensional radiation-hydrodynamic simulations of super-Eddington accretion flow and outflow around black holes to examine the properties of radiation and outflow as functions of the black hole mass and the accretion rate on to the black hole (ṀBH). We find that the ṁBH(≡ṀBHc2∕LEdd) dependence of Lrad∕LEdd and Lmech∕LEdd...

Strong He I Emission Lines in High N/O Galaxies at z ~ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?

Image

Yanagisawa, Hiroto,   Ouchi, Masami,   Watanabe, Kuria,   Matsumoto, Akinori,   Nakajima, Kimihiko,   Yajima, Hidenobu

We present He I/Hβ flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ~ 6 mostly with the spectroscopic coverage from He I λ4471 and He II λ4686 to He I λ7065, and comparing...

Balmer Decrement Anomalies in Galaxies at z ~ 6 Found by JWST Observations: Density-bounded Nebulae or Excited H I Clouds?

Image

Yanagisawa, Hiroto,   Ouchi, Masami,   Nakajima, Kimihiko,   Yajima, Hidenobu,   Umeda, Hiroya,   Baba, Shunsuke

We investigate the physical origins of the Balmer decrement anomalies in GS-NDG-9422 and RXCJ2248-ID galaxies at z ~ 6 whose Hα/Hβ values are significantly smaller than 2.7, the latter of which also shows anomalous Hγ/Hβ and Hδ/Hβ values beyond the errors. Because the anomalous Balmer decrements are not reproduced under...

A universal scaling relation incorporating the cusp-to-core transition of dark matter halos

Image

Kaneda, Yuka,   Mori, Masao,   Otaki, Koki

The dark matter halos associated with galaxies have hitherto established strong correlations within a range of observed parameters, known as scaling relations of dark matter halos. The origin of these scaling relations still contains significant ambiguities and requires comprehensive exploration for complete understanding. Utilising the correlation between the concentration and...

Impacts of stellar wind and supernovae on star cluster formation: Origins of extremely high N/O ratios and multiple stellar populations

Image

Fukushima, Hajime,   Yajima, Hidenobu

We study metal enrichment originating from stellar wind and supernovae in low-metallicity clouds by performing three-dimensional radiation hydrodynamics simulations. We find that metals ejected from stellar wind are accumulated, leading to subsequent star formation in the nitrogen-enriched gas. During this early phase, the N∕O ratios are similar to observed nitrogen-enriched...

General Relativistic Radiation Magnetohydrodynamics Simulations of Precessing Tilted Super-Eddington Disks

Image

Asahina, Yuta,   Ohsuga, Ken

We perform a three-dimensional general relativistic radiation magnetohydrodynamics simulation of a tilted super-Eddington accretion disk around a spinning black hole (BH). The disk, which tilts and twists as it approaches the BH, precesses while maintaining its shape. The gas is mainly ejected around the rotation axis of the outer part...

Evolution of the Termination Region of the Parsec-scale Jet of 3C 84 Over the Past 20 yr

Image

Kam, Minchul,   Hodgson, Jeffrey A.,   Park, Jongho,   Kino, Motoki,   Nagai, Hiroshi,   Trippe, Sascha

We present the kinematics of the parsec-scale jet in 3C 84 from 2003 November to 2022 June observed with the Very Long Baseline Array at 43 GHz. We find that the C3 component, a bright feature at the termination region of the jet component ejected from the core in 2003,...

Violent Starbursts and Quiescence Induced by Far-ultraviolet Radiation Feedback in Metal-poor Galaxies at High Redshift

Image

Sugimura, Kazuyuki,   Ricotti, Massimo,   Park, Jongwon,   Garcia, Fred Angelo Batan,   Yajima, Hidenobu

JWST observations of galaxies at z ≳ 8 suggest that they are more luminous and clumpier than predicted by most models, prompting several proposals on the physics of star formation and feedback in the first galaxies. In this paper, we focus on the role of ultraviolet (UV) radiation in regulating...

Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models

Image

Ogihara, Taiki,   Kawashima, Tomohisa,   Ohsuga, Ken

By performing general-relativistic radiative transfer calculations, we show the radio images of relativistic jets including highly magnetized regions inside jet funnels, based on steady, axisymmetric, and semianalytic general-relativistic magnetohydrodynamics models. It is found that multiple ring images appear at the photon frequency of 230 GHz for nearly pole-on observers, because...

Radiation MHD Simulations of Soft X-Ray Emitting Regions in Changing Look AGN

Image

Igarashi, Taichi,   Takahashi, Hiroyuki R.,   Kawashima, Tomohisa,   Ohsuga, Ken,   Matsumoto, Yosuke,   Matsumoto, Ryoji

Strong soft X-ray emission called soft X-ray excess is often observed in luminous active galactic nuclei (AGN). It has been suggested that the soft X-rays are emitted from a warm (T = 106 ~ 107 K) region that is optically thick for the Thomson scattering (warm Comptonization region). Motivated by...

A Relativistic Formula for the Multiple Scattering of Photons

Image

Takahashi, Rohta,   Umemura, Masayuki,   Ohsuga, Ken,   Asahina, Yuta,   Takeda, Rintaro,   Takahashi, Mikiya M.

We have discovered analytical expressions for the probability density function (PDF) of photons that are multiply scattered in relativistic flows, under the assumption of isotropic and inelastic scattering. These expressions characterize the collective dynamics of these photons, ranging from free- streaming to diffusion regions. The PDF, defined within the light...

JWST Identification of Extremely Low C/N Galaxies with [N/O] 0.5 at z 6-10 Evidencing the Early CNO-cycle Enrichment and a Connection with Globular Cluster Formation

Image

Isobe, Yuki,   Ouchi, Masami,   Tominaga, Nozomu,   Watanabe, Kuria,   Nakajima, Kimihiko,   Umeda, Hiroya

We present chemical abundance ratios of 70 star-forming galaxies at z ~ 4-10 observed by the JWST/NIRSpec Early Release Observations, GLASS, and CEERS programs. Among the 70 galaxies, we have pinpointed two galaxies, CEERS_01019 at z = 8.68 and GLASS_150008 at z = 6.23, with extremely low C/N ([C/N] ≲...

Transonic galactic wind model including stellar feedbacks and application to outflows in high/low-z galaxies

Image

Igarashi, Asuka,   Mori, Masao,   Nitta, Shin-ya

Galactic winds play a crucial role in the ejection of the interstellar medium (ISM) into intergalactic space. This study presents a model that classifies possible transonic solutions of galactic winds in the gravitational potential of the dark matter halo and stellar component under spherically symmetric and steady assumptions. Our model...

Frequency of the dark matter subhalo collisions and bifurcation sequence arising formation of dwarf galaxies

Image

Otaki, Koki,   Mori, Masao

The cold dark matter model predicts galaxies have 100 times more dark matter mass than stars. Nevertheless, recent observations report the existence of dark-matter-deficient galaxies with less dark matter than expected. To solve this problem, we investigate the physical processes of galaxy formation in head-on collisions between gas-containing dark matter...

FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions

Image

Harada, Naoki,   Yajima, Hidenobu,   Abe, Makito

We study gas and metal outflow from massive galaxies in protocluster regions at z = 3 - 9 by using the results of FOREVER22 simulation projects. Our simulations contain massive haloes with Mhrsim1013 M⊙, showing high star formation rates of > 100 M⊙ yr-1 and hosting supermassive black holes with MBHrsim108 M⊙. We show...

Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality

Image

Fukushima, Hajime,   Yajima, Hidenobu,   Umemura, Masayuki

The homochirality of biological molecules on Earth is a long-standing mystery regarding the origin of life. Circularly polarized ultraviolet (UV) light could induce the enantiomeric excess of biological molecules in the interstellar medium, leading to the homochirality on Earth. By performing 3D radiation transfer simulations with multiple scattering processes in...

The formation of globular clusters with top-heavy initial mass functions

Image

Fukushima, Hajime,   Yajima, Hidenobu

We study the formation of globular clusters (GCs) in massive compact clouds with the low metallicity of Z = 10-3 Z⊙byperformingthree-dimensionalradiative- hydrodynamicsimulations.Consideringtheuncertaintyoftheinitialmassfunction(IMF)ofstarsformedinlow- metallicityandhigh-densityclouds,weinvestigatetheimpactsoftheIMFonthecloudconditionfortheGCformationwiththerangeofthepower- lawindexofIMFasγ = 1-2.35. We find that the threshold surface density (Σthr) for the GC formation increases from 800 M⊙pc^-2atγ = 2.35 to 1600 M⊙pc^-2atγ = 1.5 in...

Precessing jet nozzle connecting to a spinning black hole in M87

Image

Cui, Yuzhu,   Hada, Kazuhiro,   Kawashima, Tomohisa,   Kino, Motoki,   Lin, Weikang,   Mizuno, Yosuke

The nearby radio galaxy M87 offers a unique opportunity to explore the connections between the central supermassive black hole and relativistic jets. Previous studies of the inner region of M87 revealed a wide opening angle for the jet originating near the black hole1-4. The Event Horizon Telescope resolved the central...

FOREVER22: The first bright galaxies with population III stars at redshifts z 10-20 and comparisons with JWST data

Image

Yajima, Hidenobu,   Abe, Makito,   Fukushima, Hajime,   Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami

We study the formation of the first galaxies in overdense regions modelled by the FOREVER22 simulation project. Our simulations successfully reproduce the star formation rates and the MUV - Mstar relations of candidate galaxies at z ~ 10 - 14 observed by James Webb Space Telescope (JWST). We suggest that...

Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data

Image

Sun, Dongsheng,   Mawatari, Ken,   Ouchi, Masami,   Ono, Yoshiaki,   Yajima, Hidenobu,   Zhang, Yechi

We present cosmological-scale three-dimensional neutral hydrogen (H I) tomographic maps at z = 2-3 over a total of 837 deg2 in two blank fields that are developed with Lyα forest absorptions of 14,736 background Sloan Digital Sky Survey (SDSS) quasars at z = 2.08-3.67. Using the tomographic maps, we investigate...

Morphologies of Galaxies at z 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z 12

Image

Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami,   Yajima, Hidenobu,   Abe, Makito,   Isobe, Yuki

We present morphologies of galaxies at z ≳ 9 resolved by JWST/NIRCam 2-5 μm imaging. Our sample consists of 22 galaxy candidates identified by stringent dropout and photo-z criteria in GLASS, CEERS, SMACS J0723, and Stephan’s Quintet flanking fields, one of which has been spectroscopically identified at z = 11.44....

EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs

Image

Nishigaki, Moka,   Ouchi, Masami,   Nakajima, Kimihiko,   Ono, Yoshiaki,   Rauch, Michael,   Isobe, Yuki

We search for local extremely metal-poor galaxies (EMPGs), selecting photometric candidates by broadband color excess and machine- learning techniques with the SDSS photometric data. After removing stellar contaminants by shallow spectroscopy with Seimei and Nayuta telescopes, we confirm that three candidates are EMPGs with 0.05-0.1 Z ⊙bydeepMagellan∕MagEspectroscopyforfaint[OIII]λ4363 lines. Using a...

EMPRESS. IX. Extremely Metal-poor Galaxies are Very Gas-rich Dispersion-dominated Systems: Will the James Webb Space Telescope Witness Gaseous Turbulent High-z Primordial Galaxies?

Image

Isobe, Yuki,   Ouchi, Masami,   Nakajima, Kimihiko,   Ozaki, Shinobu,   Bouché, Nicolas F.,   Wise, John H.

We present kinematics of six local extremely metal-poor galaxies (EMPGs) with low metallicities (0.016-0.098 Z ⊙)andlowstellarmasses(10^4.7-10^7.6M_⊙).Takingdeepmedium∕high-resolution(R~ 7500) integral-field spectra with 8.2 m Subaru, we resolve the small inner velocity gradients and dispersions of the EMPGs with Hα emission. Carefully masking out substructures originating by inflow and/or outflow, we fit three-dimensional...

Image

Tracking Star-forming Cores as Mass Reservoirs in Clustered and Isolated Regions Using Numerical Passive Tracer Particles

Nozaki, Shingo,   Fukushima, Hajime,   Tokuda, Kazuki,   Machida, Masahiro N.

Understanding the physical properties of star-forming cores as mass reservoirs for protostars and the impact of turbulence is crucial in star formation studies. We implemented passive tracer particles in clump-scale numerical simulations with turbulence strengths of . Unlike core identification methods used in observational studies, we identified 260 star-forming cores...

February 2025   The Astrophysical Journal
Image

Cold gas bubble inflated by a low-luminosity radio jet

Murthy, Suma,   Morganti, Raffaella,   Oosterloo, Tom,   Mukherjee, Dipanjan,   Bayram, Suude,   Guillard, Pierre

We present NOEMA CO(2–1) observations of a nearby, young, low-luminosity radio source, B2 0258+35. Our earlier CO(1–0) study had shown the presence of strong jet- ISM interaction and a massive molecular gas outflow involving 75% of the circumnuclear gas. Our follow-up CO(2–1) observations have revealed even more complex gas kinematics,...

February 2025   Astronomy & Astrophysics
Image

Detection of the [O I] 63 μm emission line from the z = 6.04 quasar J2054-0005

Ishii, Nozomi,   Hashimoto, Takuya,   Ferkinhoff, Carl,   Rybak, Matus,   Inoue, Akio K.,   Michiyama, Tomonari

We report the highest-redshift detection of [O I] 63 μm from a luminous quasar, J2054-0005, at z = 6.04 based on the Atacama Large Millimeter/sub-millimeter Array (ALMA) Band 9 observations. The [O I] 63 μm line luminosity is (4.51.5) × 109L⊙, corresponding to the [O I] 63 μm-to-far- infrared luminosity...

February 2025   Publications of the Astronomical Society of Japan
Image

The structure of the stellar halo of the Andromeda galaxy explored with the NB515 for Subaru/HSC - I. New insights on the stellar halo up to 120 kpc

Ogami, Itsuki,   Tanaka, Mikito,   Komiyama, Yutaka,   Chiba, Masashi,   Guhathakurta, Puragra,   Kirby, Evan N.

We analyse the M31 halo and its substructure within a projected radius of 120 kpc using a combination of Subaru/HSC NB515 and Canada France Hawaii Telescope/MegaCam g and i bands. We succeed in separating M31’s halo stars from foreground contamination with ~90 per cent accuracy by using the surface gravity...

January 2025   Monthly Notices of the Royal Astronomical Society
Image

Survey of non-thermal electrons around supermassive black holes through polarization flips

Tsunetoe, Yuh,   Kawashima, Tomohisa,   Ohsuga, Ken,   Mineshige, Shin

Optically thick non-thermal synchrotron sources notably produce linear polarization vectors that are parallel to projected magnetic field lines on the observer’s screen, although they are perpendicular in well-known optically thin cases. To elucidate the complex relationship between the vectors and fields, and to investigate the energy and spatial distribution of...

December 2024   Publications of the Astronomical Society of Japan
Image

Impact of the Lyα radiation force on super-Eddington accretion on to a massive black hole

Mushano, Takuya,   Ogawa, Takumi,   Ohsuga, Ken,   Yajima, Hidenobu,   Omukai, Kazuyuki

The viability of super-Eddington accretion remains a topic of intense debate, crucial for understanding the formation of supermassive black holes in the early universe. However, the impact of the Lyα radiation force on this issue remains poorly understood. We investigate the propagation of the Lyα photons and evaluate the Lyα...

December 2024   Publications of the Astronomical Society of Japan
Image

Cosmological evolution of dark matter subhaloes under tidal stripping by growing Milky Way-like galaxies

Kazuno, Yudai,   Mori, Masao,   Kaneda, Yuka,   Otaki, Koki

We present the findings of a comprehensive and detailed analysis of merger tree data from ultra-high-resolution cosmological N-body simulations. The analysis, conducted with a particle mass resolution of 5 × 103 h-1 M⊙ and a halo mass resolution of 107 h-1 M⊙, provides sufficient accuracy to suppress numerical artefacts. This...

December 2024   Publications of the Astronomical Society of Japan
Image

GR-RMHD Simulations of Super-Eddington Accretion Flows onto a Neutron Star with Dipole and Quadrupole Magnetic Fields

Inoue, Akihiro,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Asahina, Yuta,   Middleton, Matthew J.

Although ultraluminous X-ray pulsars (ULXPs) are believed to be powered by super-Eddington accretion onto a magnetized neutron star (NS), the detailed structures of the inflow–outflow and magnetic fields are still not well understood. We perform general relativistic radiation magnetohydrodynamics (GR-RMHD) simulations of super-Eddington accretion flows onto a magnetized NS with...

December 2024   The Astrophysical Journal
Image

Dynamics of a Galaxy at z > 10 Explored by JWST Integral Field Spectroscopy: Hints of Rotating Disk Suggesting Weak Feedback

Xu, Yi,   Ouchi, Masami,   Yajima, Hidenobu,   Fukushima, Hajime,   Harikane, Yuichi,   Isobe, Yuki

We investigate the dynamics of GN-z11, a luminous galaxy at z = 10.60, carefully analyzing the public deep integral field spectroscopy (IFS) data taken with the JWST NIRSpec integral field unit. While the observations of the IFS data originally targeted an He II clump near GN-z11, we find that the...

November 2024   The Astrophysical Journal
Image

Radiation and outflow properties of super-Eddington accretion flows around various mass classes of black holes: Dependence on the accretion rates

Yoshioka, Shogo,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa,   Kitaki, Takaaki

We perform axisymmetric two-dimensional radiation-hydrodynamic simulations of super-Eddington accretion flow and outflow around black holes to examine the properties of radiation and outflow as functions of the black hole mass and the accretion rate on to the black hole (ṀBH). We find that the ṁBH(≡ṀBHc2∕LEdd) dependence of Lrad∕LEdd and Lmech∕LEdd...

October 2024   Publications of the Astronomical Society of Japan
Image

Strong He I Emission Lines in High N/O Galaxies at z ~ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?

Yanagisawa, Hiroto,   Ouchi, Masami,   Watanabe, Kuria,   Matsumoto, Akinori,   Nakajima, Kimihiko,   Yajima, Hidenobu

We present He I/Hβ flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ~ 6 mostly with the spectroscopic coverage from He I λ4471 and He II λ4686 to He I λ7065, and comparing...

October 2024   The Astrophysical Journal
Image

Balmer Decrement Anomalies in Galaxies at z ~ 6 Found by JWST Observations: Density-bounded Nebulae or Excited H I Clouds?

Yanagisawa, Hiroto,   Ouchi, Masami,   Nakajima, Kimihiko,   Yajima, Hidenobu,   Umeda, Hiroya,   Baba, Shunsuke

We investigate the physical origins of the Balmer decrement anomalies in GS-NDG-9422 and RXCJ2248-ID galaxies at z ~ 6 whose Hα/Hβ values are significantly smaller than 2.7, the latter of which also shows anomalous Hγ/Hβ and Hδ/Hβ values beyond the errors. Because the anomalous Balmer decrements are not reproduced under...

October 2024   The Astrophysical Journal
Image

A universal scaling relation incorporating the cusp-to-core transition of dark matter halos

Kaneda, Yuka,   Mori, Masao,   Otaki, Koki

The dark matter halos associated with galaxies have hitherto established strong correlations within a range of observed parameters, known as scaling relations of dark matter halos. The origin of these scaling relations still contains significant ambiguities and requires comprehensive exploration for complete understanding. Utilising the correlation between the concentration and...

October 2024   Publications of the Astronomical Society of Japan
Image

Impacts of stellar wind and supernovae on star cluster formation: Origins of extremely high N/O ratios and multiple stellar populations

Fukushima, Hajime,   Yajima, Hidenobu

We study metal enrichment originating from stellar wind and supernovae in low-metallicity clouds by performing three-dimensional radiation hydrodynamics simulations. We find that metals ejected from stellar wind are accumulated, leading to subsequent star formation in the nitrogen-enriched gas. During this early phase, the N∕O ratios are similar to observed nitrogen-enriched...

October 2024   Publications of the Astronomical Society of Japan
Image

General Relativistic Radiation Magnetohydrodynamics Simulations of Precessing Tilted Super-Eddington Disks

Asahina, Yuta,   Ohsuga, Ken

We perform a three-dimensional general relativistic radiation magnetohydrodynamics simulation of a tilted super-Eddington accretion disk around a spinning black hole (BH). The disk, which tilts and twists as it approaches the BH, precesses while maintaining its shape. The gas is mainly ejected around the rotation axis of the outer part...

September 2024   The Astrophysical Journal
Image

Evolution of the Termination Region of the Parsec-scale Jet of 3C 84 Over the Past 20 yr

Kam, Minchul,   Hodgson, Jeffrey A.,   Park, Jongho,   Kino, Motoki,   Nagai, Hiroshi,   Trippe, Sascha

We present the kinematics of the parsec-scale jet in 3C 84 from 2003 November to 2022 June observed with the Very Long Baseline Array at 43 GHz. We find that the C3 component, a bright feature at the termination region of the jet component ejected from the core in 2003,...

August 2024   The Astrophysical Journal
Image

Violent Starbursts and Quiescence Induced by Far-ultraviolet Radiation Feedback in Metal-poor Galaxies at High Redshift

Sugimura, Kazuyuki,   Ricotti, Massimo,   Park, Jongwon,   Garcia, Fred Angelo Batan,   Yajima, Hidenobu

JWST observations of galaxies at z ≳ 8 suggest that they are more luminous and clumpier than predicted by most models, prompting several proposals on the physics of star formation and feedback in the first galaxies. In this paper, we focus on the role of ultraviolet (UV) radiation in regulating...

July 2024   The Astrophysical Journal
Image

Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models

Ogihara, Taiki,   Kawashima, Tomohisa,   Ohsuga, Ken

By performing general-relativistic radiative transfer calculations, we show the radio images of relativistic jets including highly magnetized regions inside jet funnels, based on steady, axisymmetric, and semianalytic general-relativistic magnetohydrodynamics models. It is found that multiple ring images appear at the photon frequency of 230 GHz for nearly pole-on observers, because...

July 2024   The Astrophysical Journal
Image

Radiation MHD Simulations of Soft X-Ray Emitting Regions in Changing Look AGN

Igarashi, Taichi,   Takahashi, Hiroyuki R.,   Kawashima, Tomohisa,   Ohsuga, Ken,   Matsumoto, Yosuke,   Matsumoto, Ryoji

Strong soft X-ray emission called soft X-ray excess is often observed in luminous active galactic nuclei (AGN). It has been suggested that the soft X-rays are emitted from a warm (T = 106 ~ 107 K) region that is optically thick for the Thomson scattering (warm Comptonization region). Motivated by...

June 2024   The Astrophysical Journal
Image

A Relativistic Formula for the Multiple Scattering of Photons

Takahashi, Rohta,   Umemura, Masayuki,   Ohsuga, Ken,   Asahina, Yuta,   Takeda, Rintaro,   Takahashi, Mikiya M.

We have discovered analytical expressions for the probability density function (PDF) of photons that are multiply scattered in relativistic flows, under the assumption of isotropic and inelastic scattering. These expressions characterize the collective dynamics of these photons, ranging from free- streaming to diffusion regions. The PDF, defined within the light...

May 2024   The Astrophysical Journal Letters
Image

JWST Identification of Extremely Low C/N Galaxies with [N/O] 0.5 at z 6-10 Evidencing the Early CNO-cycle Enrichment and a Connection with Globular Cluster Formation

Isobe, Yuki,   Ouchi, Masami,   Tominaga, Nozomu,   Watanabe, Kuria,   Nakajima, Kimihiko,   Umeda, Hiroya

We present chemical abundance ratios of 70 star-forming galaxies at z ~ 4-10 observed by the JWST/NIRSpec Early Release Observations, GLASS, and CEERS programs. Among the 70 galaxies, we have pinpointed two galaxies, CEERS_01019 at z = 8.68 and GLASS_150008 at z = 6.23, with extremely low C/N ([C/N] ≲...

December 2023   The Astrophysical Journal
Image

Transonic galactic wind model including stellar feedbacks and application to outflows in high/low-z galaxies

Igarashi, Asuka,   Mori, Masao,   Nitta, Shin-ya

Galactic winds play a crucial role in the ejection of the interstellar medium (ISM) into intergalactic space. This study presents a model that classifies possible transonic solutions of galactic winds in the gravitational potential of the dark matter halo and stellar component under spherically symmetric and steady assumptions. Our model...

December 2023   Publications of the Astronomical Society of Japan
Image

Frequency of the dark matter subhalo collisions and bifurcation sequence arising formation of dwarf galaxies

Otaki, Koki,   Mori, Masao

The cold dark matter model predicts galaxies have 100 times more dark matter mass than stars. Nevertheless, recent observations report the existence of dark-matter-deficient galaxies with less dark matter than expected. To solve this problem, we investigate the physical processes of galaxy formation in head-on collisions between gas-containing dark matter...

October 2023   Monthly Notices of the Royal Astronomical Society
Image

FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions

Harada, Naoki,   Yajima, Hidenobu,   Abe, Makito

We study gas and metal outflow from massive galaxies in protocluster regions at z = 3 - 9 by using the results of FOREVER22 simulation projects. Our simulations contain massive haloes with Mhrsim1013 M⊙, showing high star formation rates of > 100 M⊙ yr-1 and hosting supermassive black holes with MBHrsim108 M⊙. We show...

September 2023   Monthly Notices of the Royal Astronomical Society
Image

Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality

Fukushima, Hajime,   Yajima, Hidenobu,   Umemura, Masayuki

The homochirality of biological molecules on Earth is a long-standing mystery regarding the origin of life. Circularly polarized ultraviolet (UV) light could induce the enantiomeric excess of biological molecules in the interstellar medium, leading to the homochirality on Earth. By performing 3D radiation transfer simulations with multiple scattering processes in...

September 2023   Monthly Notices of the Royal Astronomical Society
Image

The formation of globular clusters with top-heavy initial mass functions

Fukushima, Hajime,   Yajima, Hidenobu

We study the formation of globular clusters (GCs) in massive compact clouds with the low metallicity of Z = 10-3 Z⊙byperformingthree-dimensionalradiative- hydrodynamicsimulations.Consideringtheuncertaintyoftheinitialmassfunction(IMF)ofstarsformedinlow- metallicityandhigh-densityclouds,weinvestigatetheimpactsoftheIMFonthecloudconditionfortheGCformationwiththerangeofthepower- lawindexofIMFasγ = 1-2.35. We find that the threshold surface density (Σthr) for the GC formation increases from 800 M⊙pc^-2atγ = 2.35 to 1600 M⊙pc^-2atγ = 1.5 in...

September 2023   Monthly Notices of the Royal Astronomical Society
Image

Precessing jet nozzle connecting to a spinning black hole in M87

Cui, Yuzhu,   Hada, Kazuhiro,   Kawashima, Tomohisa,   Kino, Motoki,   Lin, Weikang,   Mizuno, Yosuke

The nearby radio galaxy M87 offers a unique opportunity to explore the connections between the central supermassive black hole and relativistic jets. Previous studies of the inner region of M87 revealed a wide opening angle for the jet originating near the black hole1-4. The Event Horizon Telescope resolved the central...

September 2023   Nature
Image

FOREVER22: The first bright galaxies with population III stars at redshifts z 10-20 and comparisons with JWST data

Yajima, Hidenobu,   Abe, Makito,   Fukushima, Hajime,   Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami

We study the formation of the first galaxies in overdense regions modelled by the FOREVER22 simulation project. Our simulations successfully reproduce the star formation rates and the MUV - Mstar relations of candidate galaxies at z ~ 10 - 14 observed by James Webb Space Telescope (JWST). We suggest that...

August 2023   Monthly Notices of the Royal Astronomical Society
Image

Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data

Sun, Dongsheng,   Mawatari, Ken,   Ouchi, Masami,   Ono, Yoshiaki,   Yajima, Hidenobu,   Zhang, Yechi

We present cosmological-scale three-dimensional neutral hydrogen (H I) tomographic maps at z = 2-3 over a total of 837 deg2 in two blank fields that are developed with Lyα forest absorptions of 14,736 background Sloan Digital Sky Survey (SDSS) quasars at z = 2.08-3.67. Using the tomographic maps, we investigate...

July 2023   The Astrophysical Journal
Image

Morphologies of Galaxies at z 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z 12

Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami,   Yajima, Hidenobu,   Abe, Makito,   Isobe, Yuki

We present morphologies of galaxies at z ≳ 9 resolved by JWST/NIRCam 2-5 μm imaging. Our sample consists of 22 galaxy candidates identified by stringent dropout and photo-z criteria in GLASS, CEERS, SMACS J0723, and Stephan’s Quintet flanking fields, one of which has been spectroscopically identified at z = 11.44....

July 2023   The Astrophysical Journal
Image

EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs

Nishigaki, Moka,   Ouchi, Masami,   Nakajima, Kimihiko,   Ono, Yoshiaki,   Rauch, Michael,   Isobe, Yuki

We search for local extremely metal-poor galaxies (EMPGs), selecting photometric candidates by broadband color excess and machine- learning techniques with the SDSS photometric data. After removing stellar contaminants by shallow spectroscopy with Seimei and Nayuta telescopes, we confirm that three candidates are EMPGs with 0.05-0.1 Z ⊙bydeepMagellan∕MagEspectroscopyforfaint[OIII]λ4363 lines. Using a...

July 2023   The Astrophysical Journal
Image

EMPRESS. IX. Extremely Metal-poor Galaxies are Very Gas-rich Dispersion-dominated Systems: Will the James Webb Space Telescope Witness Gaseous Turbulent High-z Primordial Galaxies?

Isobe, Yuki,   Ouchi, Masami,   Nakajima, Kimihiko,   Ozaki, Shinobu,   Bouché, Nicolas F.,   Wise, John H.

We present kinematics of six local extremely metal-poor galaxies (EMPGs) with low metallicities (0.016-0.098 Z ⊙)andlowstellarmasses(10^4.7-10^7.6M_⊙).Takingdeepmedium∕high-resolution(R~ 7500) integral-field spectra with 8.2 m Subaru, we resolve the small inner velocity gradients and dispersions of the EMPGs with Hα emission. Carefully masking out substructures originating by inflow and/or outflow, we fit three-dimensional...

July 2023   The Astrophysical Journal

Tracking Star-forming Cores as Mass Reservoirs in Clustered and Isolated Regions Using Numerical Passive Tracer Particles

Nozaki, Shingo,   Fukushima, Hajime,   Tokuda, Kazuki,   Machida, Masahiro N.
February 2025   The Astrophysical Journal

Cold gas bubble inflated by a low-luminosity radio jet

Murthy, Suma,   Morganti, Raffaella,   Oosterloo, Tom,   Mukherjee, Dipanjan,   Bayram, Suude,   Guillard, Pierre
February 2025   Astronomy & Astrophysics

Detection of the [O I] 63 μm emission line from the z = 6.04 quasar J2054-0005

Ishii, Nozomi,   Hashimoto, Takuya,   Ferkinhoff, Carl,   Rybak, Matus,   Inoue, Akio K.,   Michiyama, Tomonari
February 2025   Publications of the Astronomical Society of Japan

The structure of the stellar halo of the Andromeda galaxy explored with the NB515 for Subaru/HSC - I. New insights on the stellar halo up to 120 kpc

Ogami, Itsuki,   Tanaka, Mikito,   Komiyama, Yutaka,   Chiba, Masashi,   Guhathakurta, Puragra,   Kirby, Evan N.
January 2025   Monthly Notices of the Royal Astronomical Society

Survey of non-thermal electrons around supermassive black holes through polarization flips

Tsunetoe, Yuh,   Kawashima, Tomohisa,   Ohsuga, Ken,   Mineshige, Shin
December 2024   Publications of the Astronomical Society of Japan

Impact of the Lyα radiation force on super-Eddington accretion on to a massive black hole

Mushano, Takuya,   Ogawa, Takumi,   Ohsuga, Ken,   Yajima, Hidenobu,   Omukai, Kazuyuki
December 2024   Publications of the Astronomical Society of Japan

Cosmological evolution of dark matter subhaloes under tidal stripping by growing Milky Way-like galaxies

Kazuno, Yudai,   Mori, Masao,   Kaneda, Yuka,   Otaki, Koki
December 2024   Publications of the Astronomical Society of Japan

GR-RMHD Simulations of Super-Eddington Accretion Flows onto a Neutron Star with Dipole and Quadrupole Magnetic Fields

Inoue, Akihiro,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Asahina, Yuta,   Middleton, Matthew J.
December 2024   The Astrophysical Journal

Dynamics of a Galaxy at z > 10 Explored by JWST Integral Field Spectroscopy: Hints of Rotating Disk Suggesting Weak Feedback

Xu, Yi,   Ouchi, Masami,   Yajima, Hidenobu,   Fukushima, Hajime,   Harikane, Yuichi,   Isobe, Yuki
November 2024   The Astrophysical Journal

Radiation and outflow properties of super-Eddington accretion flows around various mass classes of black holes: Dependence on the accretion rates

Yoshioka, Shogo,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa,   Kitaki, Takaaki
October 2024   Publications of the Astronomical Society of Japan

Strong He I Emission Lines in High N/O Galaxies at z ~ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?

Yanagisawa, Hiroto,   Ouchi, Masami,   Watanabe, Kuria,   Matsumoto, Akinori,   Nakajima, Kimihiko,   Yajima, Hidenobu
October 2024   The Astrophysical Journal

Balmer Decrement Anomalies in Galaxies at z ~ 6 Found by JWST Observations: Density-bounded Nebulae or Excited H I Clouds?

Yanagisawa, Hiroto,   Ouchi, Masami,   Nakajima, Kimihiko,   Yajima, Hidenobu,   Umeda, Hiroya,   Baba, Shunsuke
October 2024   The Astrophysical Journal

A universal scaling relation incorporating the cusp-to-core transition of dark matter halos

Kaneda, Yuka,   Mori, Masao,   Otaki, Koki
October 2024   Publications of the Astronomical Society of Japan

Impacts of stellar wind and supernovae on star cluster formation: Origins of extremely high N/O ratios and multiple stellar populations

Fukushima, Hajime,   Yajima, Hidenobu
October 2024   Publications of the Astronomical Society of Japan

General Relativistic Radiation Magnetohydrodynamics Simulations of Precessing Tilted Super-Eddington Disks

Asahina, Yuta,   Ohsuga, Ken
September 2024   The Astrophysical Journal

Evolution of the Termination Region of the Parsec-scale Jet of 3C 84 Over the Past 20 yr

Kam, Minchul,   Hodgson, Jeffrey A.,   Park, Jongho,   Kino, Motoki,   Nagai, Hiroshi,   Trippe, Sascha
August 2024   The Astrophysical Journal

Violent Starbursts and Quiescence Induced by Far-ultraviolet Radiation Feedback in Metal-poor Galaxies at High Redshift

Sugimura, Kazuyuki,   Ricotti, Massimo,   Park, Jongwon,   Garcia, Fred Angelo Batan,   Yajima, Hidenobu
July 2024   The Astrophysical Journal

Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models

Ogihara, Taiki,   Kawashima, Tomohisa,   Ohsuga, Ken
July 2024   The Astrophysical Journal

Radiation MHD Simulations of Soft X-Ray Emitting Regions in Changing Look AGN

Igarashi, Taichi,   Takahashi, Hiroyuki R.,   Kawashima, Tomohisa,   Ohsuga, Ken,   Matsumoto, Yosuke,   Matsumoto, Ryoji
June 2024   The Astrophysical Journal

A Relativistic Formula for the Multiple Scattering of Photons

Takahashi, Rohta,   Umemura, Masayuki,   Ohsuga, Ken,   Asahina, Yuta,   Takeda, Rintaro,   Takahashi, Mikiya M.
May 2024   The Astrophysical Journal Letters

JWST Identification of Extremely Low C/N Galaxies with [N/O] 0.5 at z 6-10 Evidencing the Early CNO-cycle Enrichment and a Connection with Globular Cluster Formation

Isobe, Yuki,   Ouchi, Masami,   Tominaga, Nozomu,   Watanabe, Kuria,   Nakajima, Kimihiko,   Umeda, Hiroya
December 2023   The Astrophysical Journal

Transonic galactic wind model including stellar feedbacks and application to outflows in high/low-z galaxies

Igarashi, Asuka,   Mori, Masao,   Nitta, Shin-ya
December 2023   Publications of the Astronomical Society of Japan

Frequency of the dark matter subhalo collisions and bifurcation sequence arising formation of dwarf galaxies

Otaki, Koki,   Mori, Masao
October 2023   Monthly Notices of the Royal Astronomical Society

FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions

Harada, Naoki,   Yajima, Hidenobu,   Abe, Makito
September 2023   Monthly Notices of the Royal Astronomical Society

Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality

Fukushima, Hajime,   Yajima, Hidenobu,   Umemura, Masayuki
September 2023   Monthly Notices of the Royal Astronomical Society

The formation of globular clusters with top-heavy initial mass functions

Fukushima, Hajime,   Yajima, Hidenobu
September 2023   Monthly Notices of the Royal Astronomical Society

Precessing jet nozzle connecting to a spinning black hole in M87

Cui, Yuzhu,   Hada, Kazuhiro,   Kawashima, Tomohisa,   Kino, Motoki,   Lin, Weikang,   Mizuno, Yosuke
September 2023   Nature

FOREVER22: The first bright galaxies with population III stars at redshifts z 10-20 and comparisons with JWST data

Yajima, Hidenobu,   Abe, Makito,   Fukushima, Hajime,   Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami
August 2023   Monthly Notices of the Royal Astronomical Society

Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data

Sun, Dongsheng,   Mawatari, Ken,   Ouchi, Masami,   Ono, Yoshiaki,   Yajima, Hidenobu,   Zhang, Yechi
July 2023   The Astrophysical Journal

Morphologies of Galaxies at z 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z 12

Ono, Yoshiaki,   Harikane, Yuichi,   Ouchi, Masami,   Yajima, Hidenobu,   Abe, Makito,   Isobe, Yuki
July 2023   The Astrophysical Journal

EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs

Nishigaki, Moka,   Ouchi, Masami,   Nakajima, Kimihiko,   Ono, Yoshiaki,   Rauch, Michael,   Isobe, Yuki
July 2023   The Astrophysical Journal

EMPRESS. IX. Extremely Metal-poor Galaxies are Very Gas-rich Dispersion-dominated Systems: Will the James Webb Space Telescope Witness Gaseous Turbulent High-z Primordial Galaxies?

Isobe, Yuki,   Ouchi, Masami,   Nakajima, Kimihiko,   Ozaki, Shinobu,   Bouché, Nicolas F.,   Wise, John H.
July 2023   The Astrophysical Journal

Modeling of Thermal Emission from ULX Pulsar Swift J0243.6+6124 with General Relativistic Radiation MHD Simulations

Inoue, Akihiro,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Asahina, Yuta
July 2023   The Astrophysical Journal

An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog

Ohno, Takahiro,   Tokuda, Kazuki,   Konishi, Ayu,   Matsumoto, Takeru,   Sewiło, Marta,   Kondo, Hiroshi
June 2023   The Astrophysical Journal

3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar

Kimura, Kazutaka,   Hosokawa, Takashi,   Sugimura, Kazuyuki,   Fukushima, Hajime
June 2023   The Astrophysical Journal

RAIKOU (): A General Relativistic, Multiwavelength Radiative Transfer Code

Kawashima, Tomohisa,   Ohsuga, Ken,   Takahashi, Hiroyuki R.
June 2023   The Astrophysical Journal

Detections of [C II] 158 μm and [O III] 88 μm in a Local Lyman Continuum Emitter, Mrk 54, and Its Implications to High-redshift ALMA Studies

Ura, Ryota,   Hashimoto, Takuya,   Inoue, Akio K.,   Fadda, Dario,   Hayes, Matthew,   Puschnig, Johannes
May 2023   The Astrophysical Journal

UV and Lyα Halos of Lyα Emitters across Environments at z = 2.84

Kikuta, Satoshi,   Matsuda, Yuichi,   Inoue, Shigeki,   Steidel, Charles C.,   Cen, Renyue,   Zheng, Zheng
April 2023   The Astrophysical Journal

QWIND3: UV line-driven accretion disc wind models for AGN feedback

Quera-Bofarull, Arnau,   Done, Chris,   Lacey, Cedric G.,   Nomura, Mariko,   Ohsuga, Ken
January 2023   Monthly Notices of the Royal Astronomical Society

Large-scale outflow structure and radiation properties of super-Eddington flow: Dependence on the accretion rates

Yoshioka, Shogo,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa,   Kitaki, Takaaki
December 2022   Publications of the Astronomical Society of Japan

3D photon conserving code for time-dependent general relativistic radiative transfer: CARTOON

Takahashi, Mikiya M.,   Ohsuga, Ken,   Takahashi, Rohta,   Ogawa, Takumi,   Umemura, Masayuki,   Asahina, Yuta
December 2022   Monthly Notices of the Royal Astronomical Society

Theoretical Investigation into a Possibility of Formation of Propylene Oxide Homochirality in Space

Hori, Yuta,   Nakamura, Honami,   Sakawa, Takahide,   Watanabe, Natsuki,   Kayanuma, Megumi,   Shoji, Mitsuo
November 2022   Astrobiology

Modelling observable signatures of jet-ISM interaction: thermal emission and gas kinematics

Meenakshi, Moun,   Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Nesvadba, Nicole P.~H.,   Bicknell, Geoffrey V.,   Morganti, Raffaella
October 2022   Monthly Notices of the Royal Astronomical Society

Jet-ISM Interaction in NGC 1167/B2 0258+35, an LINER with an AGN Past

Fabbiano, G.,   Paggi, A.,   Morganti, R.,   Baloković, M.,   Elvis, M.,   Mukherjee, D.
October 2022   The Astrophysical Journal

The formation of the first quasars: the black hole seeds, accretion, and feedback models

Zhu, Qirong,   Li, Yuexing,   Li, Yiting,   Maji, Moupiya,   Yajima, Hidenobu,   Schneider, Raffaella
August 2022   Monthly Notices of the Royal Astronomical Society

Component of Energy Flow from Supercritical Accretion Disks Around Rotating Stellar Mass Black Holes

Utsumi, Aoto,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Asahina, Yuta
August 2022   The Astrophysical Journal

Exploring the cosmic dawn and epoch of reionization with the 21 cm line

Shimabukuro, Hayato,   Hasegawa, Kenji,   Kuchinomachi, Akira,   Yajima, Hidenobu,   Yoshiura, Shintaro
June 2022   Publications of the Astronomical Society of Japan

Investigating the Disk-Jet Structure in M87 through Flux Separation in the Linear and Circular Polarization Images

Tsunetoe, Yuh,   Mineshige, Shin,   Kawashima, Tomohisa,   Ohsuga, Ken,   Akiyama, Kazunori,   Takahashi, Hiroyuki R.
May 2022   The Astrophysical Journal

Structure of the super-Eddington outflow and its impact on the cosmological scale

Botella, Ignacio,   Mineshige, Shin,   Kitaki, Takaaki,   Ohsuga, Ken,   Kawashima, Tomohisa
April 2022   Publications of the Astronomical Society of Japan

General Relativistic Radiation Magnetohydrodynamics Simulations of Black Hole Accretion Disks: Comparison of Methods Based on Variable Eddington Tensor and Based on M1 Closure

Asahina, Yuta,   Ohsuga, Ken
April 2022   The Astrophysical Journal

FOREVER22: galaxy formation in protocluster regions

Yajima, Hidenobu,   Abe, Makito,   Khochfar, Sadegh,   Nagamine, Kentaro,   Inoue, Akio K.,   Kodama, Tadayuki
January 2022   Monthly Notices of the Royal Astronomical Society

The extent of ionization in simulations of radio-loud AGNs impacting kpc gas discs

Meenakshi, Moun,   Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Nesvadba, Nicole P.~H.,   Morganti, Raffaella,   Janssen, Reinier M.~J.
January 2022   Monthly Notices of the Royal Astronomical Society

Far and extreme UV radiation feedback in molecular clouds and its influence on the mass and size of star clusters

Fukushima, Hajime,   Yajima, Hidenobu
January 2022   Monthly Notices of the Royal Astronomical Society

An Unbiased CO Survey toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. I. Overview: CO Cloud Distributions

Tokuda, Kazuki,   Kondo, Hiroshi,   Ohno, Takahiro,   Konishi, Ayu,   Sano, Hidetoshi,   Tsuge, Kisetsu
December 2021   The Astrophysical Journal

Tracing the Ionization Structure of the Shocked Filaments of NGC 6240

Medling, Anne M.,   Kewley, Lisa J.,   Calzetti, Daniela,   Privon, George C.,   Larson, Kirsten,   Rich, Jeffrey A.
December 2021   The Astrophysical Journal

Impact of relativistic jets on the star formation rate: a turbulence-regulated framework

Mandal, Ankush,   Mukherjee, Dipanjan,   Federrath, Christoph,   Nesvadba, Nicole P.~H.,   Bicknell, Geoffrey V.,   Wagner, Alexander Y.
December 2021   Monthly Notices of the Royal Astronomical Society

Tracing the Milky Way's Vestigial Nuclear Jet

Cecil, Gerald,   Wagner, Alexander Y.,   Bland-Hawthorn, Joss,   Bicknell, Geoffrey V.,   Mukherjee, Dipanjan
December 2021   The Astrophysical Journal

Formation of the first galaxies in the aftermath of the first supernovae

Abe, Makito,   Yajima, Hidenobu,   Khochfar, Sadegh,   Dalla Vecchia, Claudio,   Omukai, Kazuyuki
December 2021   Monthly Notices of the Royal Astronomical Society

Internal R-process Abundance Spread of M15 and a Single Stellar Population Model

Tarumi, Yuta,   Yoshida, Naoki,   Inoue, Shigeki
November 2021   The Astrophysical Journal Letters

Resolved simulations of jet-ISM interaction: Implications for gas dynamics and star formation

Mukherjee, Dipanjan,   Bicknell, Geoffrey V.,   Wagner, Alexander Y.
November 2021   Astronomische Nachrichten

Fragmentation of ring galaxies and transformation to clumpy galaxies

Inoue, Shigeki,   Yoshida, Naoki,   Hernquist, Lars
November 2021   Monthly Notices of the Royal Astronomical Society

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IV. Rapidly Growing (Super)Massive Black Holes in Extremely Radio-loud Galaxies

Ichikawa, Kohei,   Yamashita, Takuji,   Toba, Yoshiki,   Nagao, Tohru,   Inayoshi, Kohei,   Charisi, Maria
November 2021   The Astrophysical Journal

Radiation hydrodynamics simulations of line-driven AGN disc winds: metallicity dependence and black hole growth

Nomura, Mariko,   Omukai, Kazuyuki,   Ohsuga, Ken
October 2021   Monthly Notices of the Royal Astronomical Society

Jet-driven AGN feedback on molecular gas and low star-formation efficiency in a massive local spiral galaxy with a bright X-ray halo

Nesvadba, N.~P.~H.,   Wagner, A.~Y.,   Mukherjee, D.,   Mandal, A.,   Janssen, R.~M.~J.,   Zovaro, H.
October 2021   Astronomy & Astrophysics

Radiation hydrodynamics simulations of massive star cluster formation in giant molecular clouds

Fukushima, Hajime,   Yajima, Hidenobu
October 2021   Monthly Notices of the Royal Astronomical Society

Shock-multicloud interactions in galactic outflows - II. Radiative fractal clouds and cold gas thermodynamics

Banda-Barragán, W.~E.,   Brüggen, M.,   Heesen, V.,   Scannapieco, E.,   Cottle, J.,   Federrath, C.
October 2021   Monthly Notices of the Royal Astronomical Society

Instability analysis for spiral arms of local galaxies: M51, NGC 3627, and NGC 628

Inoue, Shigeki,   Takagi, Toshinobu,   Miyazaki, Atsushi,   Cooper, Erin Mentuch,   Egusa, Fumi,   Yajima, Hidenobu
September 2021   Monthly Notices of the Royal Astronomical Society

Polarization images of accretion flow around supermassive black holes: Imprints of toroidal field structure

Tsunetoe, Yuh,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa,   Akiyama, Kazunori
August 2021   Publications of the Astronomical Society of Japan

s-process enrichment of ultrafaint dwarf galaxies

Tarumi, Yuta,   Suda, Takuma,   van de Voort, Freeke,   Inoue, Shigeki,   Yoshida, Naoki,   Frebel, Anna
August 2021   Monthly Notices of the Royal Astronomical Society

UV line-driven disc wind as the origin of UltraFast Outflows in AGN

Mizumoto, Misaki,   Nomura, Mariko,   Done, Chris,   Ohsuga, Ken,   Odaka, Hirokazu
May 2021   Monthly Notices of the Royal Astronomical Society

EMPRESS. II. Highly Fe-enriched Metal-poor Galaxies with \ensuremath∼1.0 (Fe/O)$_\ensuremathødot$ and 0.02 (O/H)$_\ensuremathødot$: Possible Traces of Supermassive (>300 M$_\ensuremathødot$) Stars in Early Galaxies

Kojima, Takashi,   Ouchi, Masami,   Rauch, Michael,   Ono, Yoshiaki,   Nakajima, Kimihiko,   Isobe, Yuki
May 2021   The Astrophysical Journal

Effects of the Compressibility of Turbulence on the Dust Coagulation Process in Protoplanetary Disks

Sakurai, Yoshiki,   Ishihara, Takashi,   Furuya, Hitomi,   Umemura, Masayuki,   Shiraishi, Kenji
April 2021   The Astrophysical Journal

Unravelling the enigmatic ISM conditions in Minkowski's object

Zovaro, Henry R.~M.,   Sharp, Robert,   Nesvadba, Nicole P.~H.,   Kewley, Lisa,   Sutherland, Ralph,   Taylor, Philip
December 2020   Monthly Notices of the Royal Astronomical Society

Cosmological Vlasov─Poisson Simulations of Structure Formation with Relic Neutrinos: Nonlinear Clustering and the Neutrino Mass

Yoshikawa, Kohji,   Tanaka, Satoshi,   Yoshida, Naoki,   Saito, Shun
December 2020   The Astrophysical Journal

2D numerical study for magnetic field dependence of neutrino-driven core-collapse supernova models

Matsumoto, J.,   Takiwaki, T.,   Kotake, K.,   Asahina, Y.,   Takahashi, H.~R.
December 2020   Monthly Notices of the Royal Astronomical Society

CHORUS. I. Cosmic HydrOgen Reionization Unveiled with Subaru: Overview

Inoue, Akio K.,   Yamanaka, Satoshi,   Ouchi, Masami,   Iwata, Ikuru,   Shimasaku, Kazuhiro,   Taniguchi, Yoshiaki
December 2020   Publications of the Astronomical Society of Japan

Shock-multicloud interactions in galactic outflows - I. Cloud layers with lognormal density distributions

Banda-Barragán, W.~E.,   Brüggen, M.,   Federrath, C.,   Wagner, A.~Y.,   Scannapieco, E.,   Cottle, J.
December 2020   Monthly Notices of the Royal Astronomical Society

The CO universe: modelling CO emission and H$_2$ abundance in cosmological galaxy formation simulations

Inoue, Shigeki,   Yoshida, Naoki,   Yajima, Hidenobu
November 2020   Monthly Notices of the Royal Astronomical Society

Starbursting [O III] emitters and quiescent [C II] emitters in the reionization era

Arata, Shohei,   Yajima, Hidenobu,   Nagamine, Kentaro,   Abe, Makito,   Khochfar, Sadegh
November 2020   Monthly Notices of the Royal Astronomical Society

The thermal-radiative wind in the neutron star low-mass X-ray binary GX 13 + 1

Tomaru, Ryota,   Done, Chris,   Ohsuga, Ken,   Odaka, Hirokazu,   Takahashi, Tadayuki
October 2020   Monthly Notices of the Royal Astronomical Society

Radiation Magnetohydrodynamic Simulations of Sub-Eddington Accretion Flows in AGNs: Origin of Soft X-Ray Excess and Rapid Time Variabilities

Igarashi, Taichi,   Kato, Yoshiaki,   Takahashi, Hiroyuki R.,   Ohsuga, Ken,   Matsumoto, Yosuke,   Matsumoto, Ryoji
October 2020   The Astrophysical Journal

Formation of massive stars under protostellar radiation feedback: very metal-poor stars

Fukushima, Hajime,   Hosokawa, Takashi,   Chiaki, Gen,   Omukai, Kazuyuki,   Yoshida, Naoki,   Kuiper, Rolf
September 2020   Monthly Notices of the Royal Astronomical Society

Star cluster formation and cloud dispersal by radiative feedback: dependence on metallicity and compactness

Fukushima, Hajime,   Yajima, Hidenobu,   Sugimura, Kazuyuki,   Hosokawa, Takashi,   Omukai, Kazuyuki,   Matsumoto, Tomoaki
September 2020   Monthly Notices of the Royal Astronomical Society

Extremely Metal-poor Representatives Explored by the Subaru Survey (EMPRESS). I. A Successful Machine-learning Selection of Metal-poor Galaxies and the Discovery of a Galaxy with M* < 10$^6$ M$_\ensuremathødot$ and 0.016 Z$_\ensuremathødot$

Kojima, Takashi,   Ouchi, Masami,   Rauch, Michael,   Ono, Yoshiaki,   Nakajima, Kimihiko,   Isobe, Yuki
August 2020   The Astrophysical Journal

High circular polarization of near-infrared light induced by micron-sized dust grains

Fukushima, Hajime,   Yajima, Hidenobu,   Umemura, Masayuki
August 2020   Monthly Notices of the Royal Astronomical Society

Gas, dust, and star formation in the positive AGN feedback candidate 4C 41.17 at z = 3.8

Nesvadba, N.~P.~H.,   Bicknell, G.~V.,   Mukherjee, D.,   Wagner, A.~Y.
July 2020  

Chemical Variation among Protostellar Cores: Dependence on Prestellar Core Conditions

Aikawa, Yuri,   Furuya, Kenji,   Yamamoto, Satoshi,   Sakai, Nami
July 2020   The Astrophysical Journal

The thermal-radiative wind in low-mass X-ray binary H1743-322 - II. Iron line predictions from Monte Carlo radiation transfer

Tomaru, Ryota,   Done, Chris,   Ohsuga, Ken,   Odaka, Hirokazu,   Takahashi, Tadayuki
May 2020   Monthly Notices of the Royal Astronomical Society

R-process enrichment in ultrafaint dwarf galaxies

Tarumi, Yuta,   Yoshida, Naoki,   Inoue, Shigeki
May 2020   Monthly Notices of the Royal Astronomical Society

Line-driven disc wind in near-Eddington active galactic nuclei: decrease of mass accretion rate due to powerful outflow

Nomura, Mariko,   Ohsuga, Ken,   Done, Chris
May 2020   Monthly Notices of the Royal Astronomical Society

ART$^2$: a 3D parallel multiwavelength radiative transfer code for continuum and atomic and molecular lines

Li, Yuexing,   Gu, Ming F.,   Yajima, Hidenobu,   Zhu, Qirong,   Maji, Moupiya
May 2020   Monthly Notices of the Royal Astronomical Society

Polarization imaging of M 87 jets by general relativistic radiative transfer calculation based on GRMHD simulations

Tsunetoe, Yuh,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa,   Akiyama, Kazunori
April 2020   Publications of the Astronomical Society of Japan

Deeply cooled core of the Phoenix galaxy cluster imaged by ALMA with the Sunyaev-Zel'dovich effect

Kitayama, Tetsu,   Ueda, Shutaro,   Akahori, Takuya,   Komatsu, Eiichiro,   Kawabe, Ryohei,   Kohno, Kotaro
April 2020   Publications of the Astronomical Society of Japan

Pulsed fraction of super-critical column accretion flows on to neutron stars: Modeling of ultraluminous X-ray pulsars

Inoue, Akihiro,   Ohsuga, Ken,   Kawashima, Tomohisa
April 2020   Publications of the Astronomical Society of Japan

CHORUS. III. Photometric and Spectroscopic Properties of Ly\ensuremathα Blobs at z = 4.9-7.0

Zhang, Haibin,   Ouchi, Masami,   Itoh, Ryohei,   Shibuya, Takatoshi,   Ono, Yoshiaki,   Harikane, Yuichi
March 2020   The Astrophysical Journal

Direct Measurements of Activation Energies for Surface Diffusion of CO and CO$_2$ on Amorphous Solid Water Using In Situ Transmission Electron Microscopy

Kouchi, Akira,   Furuya, Kenji,   Hama, Tetsuya,   Chigai, Takeshi,   Kozasa, Takashi,   Watanabe, Naoki
March 2020   The Astrophysical Journal Letters

Cusp-to-core transition in low-mass dwarf galaxies induced by dynamical heating of cold dark matter by primordial black holes

Boldrini, Pierre,   Miki, Yohei,   Wagner, Alexander Y.,   Mohayaee, Roya,   Silk, Joseph,   Arbey, Alexandre
March 2020   Monthly Notices of the Royal Astronomical Society

Super-critical column accretion on to strongly magnetized neutron stars in ULX pulsars

Kawashima, Tomohisa,   Ohsuga, Ken
February 2020   Publications of the Astronomical Society of Japan

Discrimination of heavy elements originating from Pop III stars in z = 3 intergalactic medium

Kirihara, Takanobu,   Hasegawa, Kenji,   Umemura, Masayuki,   Mori, Masao,   Ishiyama, Tomoaki
January 2020   Monthly Notices of the Royal Astronomical Society

Spiral-arm instability - III. Fragmentation of primordial protostellar discs

Inoue, Shigeki,   Yoshida, Naoki
January 2020   Monthly Notices of the Royal Astronomical Society

The thermal-radiative wind in low-mass X-ray binary H1743-322: radiation hydrodynamic simulations

Tomaru, Ryota,   Done, Chris,   Ohsuga, Ken,   Nomura, Mariko,   Takahashi, Tadayuki
December 2019   Monthly Notices of the Royal Astronomical Society

First Identification of 10 kpc [C II] 158 \ensuremathμm Halos around Star-forming Galaxies at z = 5─7

Fujimoto, Seiji,   Ouchi, Masami,   Ferrara, Andrea,   Pallottini, Andrea,   Ivison, R.~J.,   Behrens, Christoph
December 2019   The Astrophysical Journal

Searching for signs of jet-driven negative feedback in the nearby radio galaxy UGC 05771

Zovaro, Henry R.~M.,   Nesvadba, Nicole P.~H.,   Sharp, Robert,   Bicknell, Geoffrey V.,   Groves, Brent,   Mukherjee, Dipanjan
November 2019   Monthly Notices of the Royal Astronomical Society

Abundant Refractory Sulfur in Protoplanetary Disks

Kama, Mihkel,   Shorttle, Oliver,   Jermyn, Adam S.,   Folsom, Colin P.,   Furuya, Kenji,   Bergin, Edwin A.
November 2019   The Astrophysical Journal

ALMA observations of water deuteration: a physical diagnostic of the formation of protostars

Jensen, S.~S.,   Jørgensen, J.~K.,   Kristensen, L.~E.,   Furuya, K.,   Coutens, A.,   van Dishoeck, E.~F.
November 2019  

Super-Eddington growth of black holes in the early universe: effects of disc radiation spectra

Takeo, Eishun,   Inayoshi, Kohei,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Mineshige, Shin
September 2019   Monthly Notices of the Royal Astronomical Society

Feedback from low-luminosity radio galaxies: B2 0258+35

Murthy, Suma,   Morganti, Raffaella,   Oosterloo, Tom,   Schulz, Robert,   Mukherjee, Dipanjan,   Wagner, Alexander Y.
September 2019  

Clumpy galaxies in cosmological simulations: the effect of ISM model

Inoue, Shigeki,   Yoshida, Naoki
September 2019   Monthly Notices of the Royal Astronomical Society

H$_2$ Ortho-Para Spin Conversion on Inhomogeneous Grain Surfaces

Furuya, Kenji,   Aikawa, Yuri,   Hama, Tetsuya,   Watanabe, Naoki
September 2019   The Astrophysical Journal

Radiative properties of the first galaxies: rapid transition between UV and infrared bright phases

Arata, Shohei,   Yajima, Hidenobu,   Nagamine, Kentaro,   Li, Yuexing,   Khochfar, Sadegh
September 2019   Monthly Notices of the Royal Astronomical Society

Magnetohydrodynamic simulation code CANS+: Assessments and applications

Matsumoto, Yosuke,   Asahina, Yuta,   Kudoh, Yuki,   Kawashima, Tomohisa,   Matsumoto, Jin,   Takahashi, Hiroyuki R.
August 2019   Publications of the Astronomical Society of Japan

On the dynamics and survival of fractal clouds in galactic winds

Banda-Barragán, W.~E.,   Zertuche, F.~J.,   Federrath, C.,   Garcı́a Del Valle, J.,   Brüggen, M.,   Wagner, A.~Y.
July 2019   Monthly Notices of the Royal Astronomical Society

Jets blowing bubbles in the young radio galaxy 4C 31.04

Zovaro, Henry R.~M.,   Sharp, Robert,   Nesvadba, Nicole P.~H.,   Bicknell, Geoffrey V.,   Mukherjee, Dipanjan,   Wagner, Alexand er Y.
April 2019   Monthly Notices of the Royal Astronomical Society

Osaka feedback model: isolated disc galaxy simulations

Shimizu, Ikkoh,   Todoroki, Keita,   Yajima, Hidenobu,   Nagamine, Kentaro
April 2019   Monthly Notices of the Royal Astronomical Society

Systematic two-dimensional radiation-hydrodynamic simulations of super-Eddington accretion flow and outflow: Comparison with the slim disk model

Kitaki, Takaaki,   Mineshige, Shin,   Ohsuga, Ken,   Kawashima, Tomohisa
December 2018   Publications of the Astronomical Society of Japan

Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond

Egami, E.,   Gallerani, S.,   Schneider, R.,   Pallottini, A.,   Vallini, L.,   Sobacchi, E.
December 2018   Publications of the Astronomical Society of Australia

A Cool Core Disturbed: Observational Evidence for the Coexistence of Subsonic Sloshing Gas and Stripped Shock-heated Gas around the Core of RX J1347.5-1145

Ueda, Shutaro,   Kitayama, Tetsu,   Oguri, Masamune,   Komatsu, Eiichiro,   Akahori, Takuya,   Iono, Daisuke
October 2018   The Astrophysical Journal

Linking interstellar and cometary O$_2$: a deep search for $^16$O$^18$O in the solar-type protostar IRAS 16293-2422

Taquet, V.,   van Dishoeck, E.~F.,   Swayne, M.,   Harsono, D.,   Jørgensen, J.~K.,   Maud, L.
October 2018  

Relativistic jet feedback - III. Feedback on gas discs

Mukherjee, Dipanjan,   Bicknell, Geoffrey V.,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Silk, Joseph
October 2018   Monthly Notices of the Royal Astronomical Society

Extreme gaseous outflows in radio-loud narrow-line Seyfert 1 galaxies

Komossa, S.,   Xu, D.~W.,   Wagner, A.~Y.
July 2018   Monthly Notices of the Royal Astronomical Society

Depletion of $^15$N in the center of L1544: Early transition from atomic to molecular nitrogen?

Furuya, K.,   Watanabe, Y.,   Sakai, T.,   Aikawa, Y.,   Yamamoto, S.
July 2018  

SILVERRUSH. VI. A simulation of Ly\ensuremathα emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data

Inoue, Akio K.,   Hasegawa, Kenji,   Ishiyama, Tomoaki,   Yajima, Hidenobu,   Shimizu, Ikkoh,   Umemura, Masayuki
June 2018   Publications of the Astronomical Society of Japan

Tracing the atomic nitrogen abundance in star-forming regions with ammonia deuteration

Furuya, Kenji,   Persson, Magnus V.
June 2018   Monthly Notices of the Royal Astronomical Society

AGN feedback compared: jets versus radiation

Cielo, Salvatore,   Bieri, Rebekka,   Volonteri, Marta,   Wagner, Alexander Y.,   Dubois, Yohan
June 2018   Monthly Notices of the Royal Astronomical Society

Magnetohydrodynamic Simulations of a Plunging Black Hole into a Molecular Cloud

Nomura, Mariko,   Oka, Tomoharu,   Yamada, Masaya,   Takekawa, Shunya,   Ohsuga, Ken,   Takahashi, Hiroyuki R.
May 2018   The Astrophysical Journal

The jet-ISM interactions in IC 5063

Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Bicknell, Geoffrey V.,   Morganti, Raffaella,   Oosterloo, Tom,   Nesvadba, Nicole
May 2018   Monthly Notices of the Royal Astronomical Society

SEURAT: SPH scheme extended with ultraviolet line radiative transfer

Abe, Makito,   Suzuki, Hiroyuki,   Hasegawa, Kenji,   Semelin, Benoit,   Yajima, Hidenobu,   Umemura, Masayuki
May 2018   Monthly Notices of the Royal Astronomical Society

ALMA Observations of the IRDC Clump G34.43+00.24 MM3: Complex Organic and Deuterated Molecules

Sakai, Takeshi,   Yanagida, Takahiro,   Furuya, Kenji,   Aikawa, Yuri,   Sanhueza, Patricio,   Sakai, Nami
April 2018   The Astrophysical Journal

MAGI: many-component galaxy initializer

Miki, Yohei,   Umemura, Masayuki
April 2018   Monthly Notices of the Royal Astronomical Society

Depletion of Heavy Nitrogen in the Cold Gas of Star-forming Regions

Furuya, Kenji,   Aikawa, Yuri
April 2018   The Astrophysical Journal

Relativistic jet feedback - II. Relationship to gigahertz peak spectrum and compact steep spectrum radio galaxies

Bicknell, Geoffrey V.,   Mukherjee, Dipanjan,   Wagner, Alexand er Y.,   Sutherland, Ralph S.,   Nesvadba, Nicole P.~H.
April 2018   Monthly Notices of the Royal Astronomical Society

First-principles study of the formation of glycine-producing radicals from common interstellar species

Sato, Akimasa,   Kitazawa, Yuya,   Ochi, Toshiro,   Shoji, Mitsuo,   Komatsu, Yu,   Kayanuma, Megumi
March 2018  

Multiple Paths of Deuterium Fractionation in Protoplanetary Disks

Aikawa, Yuri,   Furuya, Kenji,   Hincelin, Ugo,   Herbst, Eric
March 2018   The Astrophysical Journal

Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC (SILVERRUSH). I. Program strategy and clustering properties of ̃2000 Ly\ensuremathα emitters at z = 6-7 over the 0.3-0.5 Gpc$^2$ survey area

Ouchi, Masami,   Harikane, Yuichi,   Shibuya, Takatoshi,   Shimasaku, Kazuhiro,   Taniguchi, Yoshiaki,   Konno, Akira
January 2018   Publications of the Astronomical Society of Japan

Ionized Gas Outflows in Infrared-bright Dust-obscured Galaxies Selected with WISE and SDSS

Toba, Yoshiki,   Bae, Hyun-Jin,   Nagao, Tohru,   Woo, Jong-Hak,   Wang, Wei-Hao,   Wagner, Alexander Y.
December 2017   The Astrophysical Journal

Multidimensional Vlasov-Poisson Simulations with High-order Monotonicity- and Positivity-preserving Schemes

Tanaka, Satoshi,   Yoshikawa, Kohji,   Minoshima, Takashi,   Yoshida, Naoki
November 2017   The Astrophysical Journal

A theoretical study of the formation of glycine via hydantoin intermediate in outer space environment

Kayanuma, Megumi,   Kidachi, Kaori,   Shoji, Mitsuo,   Komatsu, Yu,   Sato, Akimasa,   Shigeta, Yasuteru
November 2017  

ALMA Observations of the Protostar L1527 IRS: Probing Details of the Disk and the Envelope Structures

Aso, Yusuke,   Ohashi, Nagayoshi,   Aikawa, Yuri,   Machida, Masahiro N.,   Saigo, Kazuya,   Saito, Masao
November 2017   The Astrophysical Journal

Complex organics in IRAS 4A revisited with ALMA and PdBI: Striking contrast between two neighbouring protostellar cores

López-Sepulcre, A.,   Sakai, N.,   Neri, R.,   Imai, M.,   Oya, Y.,   Ceccarelli, C.
October 2017  

The Formation and Physical Origin of Highly Ionized Cooling Gas

Bordoloi, Rongmon,   Wagner, Alexander Y.,   Heckman, Timothy M.,   Norman, Colin A.
October 2017   The Astrophysical Journal

The nature of the progenitor of the M31 north-western stream: globular clusters as milestones of its orbit

Kirihara, T.,   Miki, Y.,   Mori, M.
August 2017   Monthly Notices of the Royal Astronomical Society

Universal Dark Halo Scaling Relation for the Dwarf Spheroidal Satellites

Hayashi, Kohei,   Ishiyama, Tomoaki,   Ogiya, Go,   Chiba, Masashi,   Inoue, Shigeki,   Mori, Masao
July 2017   The Astrophysical Journal

NH$_3$ (1$_0$-0$_0$) in the pre-stellar core L1544

Caselli, P.,   Bizzocchi, L.,   Keto, E.,   Sipilä, O.,   Tafalla, M.,   Pagani, L.
July 2017  

L483: Warm Carbon-chain Chemistry Source Harboring Hot Corino Activity

Oya, Yoko,   Sakai, Nami,   Watanabe, Yoshimasa,   Higuchi, Aya E.,   Hirota, Tomoya,   López-Sepulcre, Ana
March 2017   The Astrophysical Journal

Effects of Grain Growth on Molecular Abundances in Young Stellar Objects

Harada, Nanase,   Hasegawa, Yasuhiro,   Aikawa, Yuri,   Hirashita, Hiroyuki,   Liu, Haoyu Baobab,   Hirano, Naomi
March 2017   The Astrophysical Journal

Water delivery from cores to disks: Deuteration as a probe of the prestellar inheritance of H$_2$O

Furuya, K.,   Drozdovskaya, M.~N.,   Visser, R.,   van Dishoeck, E.~F.,   Walsh, C.,   Harsono, D.
March 2017  

ALMA Reveals Strong [C II] Emission in a Galaxy Embedded in a Giant Ly\ensuremathα Blob at z = 3.1

Umehata, Hideki,   Matsuda, Yuichi,   Tamura, Yoichi,   Kohno, Kotaro,   Smail, Ian,   Ivison, R.~J.
January 2017   The Astrophysical Journal Letters

Outflows driven by quasars in high-redshift galaxies with radiation hydrodynamics

Bieri, Rebekka,   Dubois, Yohan,   Rosdahl, Joakim,   Wagner, Alexander,   Silk, Joseph,   Mamon, Gary A.
January 2017   Monthly Notices of the Royal Astronomical Society

Following the Interstellar History of Carbon: From the Interiors of Stars to the Surfaces of Planets

Ziurys, L.~M.,   Halfen, D.~T.,   Geppert, W.,   Aikawa, Y.
December 2016  

Cosmology with the Square Kilometre Array by SKA-Japan

Yamauchi, Daisuke,   Ichiki, Kiyotomo,   Kohri, Kazunori,   Namikawa, Toshiya,   Oyama, Yoshihiko,   Sekiguchi, Toyokazu
December 2016   Publications of the Astronomical Society of Japan

ALMA Reveals the Anatomy of the mm-sized Dust and Molecular Gas in the HD 97048 Disk

Walsh, Catherine,   Juhász, Attila,   Meeus, Gwendolyn,   Dent, William R.~F.,   Maud, Luke T.,   Aikawa, Yuri
November 2016   The Astrophysical Journal

Spectral Line Survey toward a Molecular Cloud in IC10

Nishimura, Yuri,   Shimonishi, Takashi,   Watanabe, Yoshimasa,   Sakai, Nami,   Aikawa, Yuri,   Kawamura, Akiko
October 2016   The Astrophysical Journal

The Sunyaev-Zel'dovich effect at 5″: RX J1347.5-1145 imaged by ALMA

Kitayama, Tetsu,   Ueda, Shutaro,   Takakuwa, Shigehisa,   Tsutsumi, Takahiro,   Komatsu, Eiichiro,   Akahori, Takuya
October 2016   Publications of the Astronomical Society of Japan

Discovery of a Hot Corino in the Bok Globule B335

Imai, Muneaki,   Sakai, Nami,   Oya, Yoko,   López-Sepulcre, Ana,   Watanabe, Yoshimasa,   Ceccarelli, Cecilia
October 2016   The Astrophysical Journal Letters

Collision Tomography: Physical Properties of Possible Progenitors of the Andromeda Stellar Stream

Miki, Yohei,   Mori, Masao,   Rich, R. Michael
August 2016   The Astrophysical Journal

Sub-parsec-scale dynamics of a dusty gas disc exposed to anisotropic AGN radiation with frequency-dependent radiative transfer

Namekata, Daisuke,   Umemura, Masayuki
July 2016   Monthly Notices of the Royal Astronomical Society

First Detection of Gas-phase Methanol in a Protoplanetary Disk

Walsh, Catherine,   Loomis, Ryan A.,   Öberg, Karin I.,   Kama, Mihkel,   van 't Hoff, Merel L.~R.,   Millar, Tom J.
May 2016   The Astrophysical Journal Letters

Jet-intracluster medium interaction in Hydra A - II. The effect of jet precession

Nawaz, M.~A.,   Bicknell, G.~V.,   Wagner, A.~Y.,   Sutherland , R.~S.,   McNamara, B.~R.
May 2016   Monthly Notices of the Royal Astronomical Society

Subarcsecond Analysis of the Infalling-Rotating Envelope around the Class I Protostar IRAS 04365+2535

Sakai, Nami,   Oya, Yoko,   López-Sepulcre, Ana,   Watanabe, Yoshimasa,   Sakai, Takeshi,   Hirota, Tomoya
April 2016   The Astrophysical Journal Letters

Statistical properties of diffuse Ly\ensuremathα haloes around star-forming galaxies at z ̃ 2

Momose, Rieko,   Ouchi, Masami,   Nakajima, Kimihiko,   Ono, Yoshiaki,   Shibuya, Takatoshi,   Shimasaku, Kazuhiro
April 2016   Monthly Notices of the Royal Astronomical Society

Galaxy-scale AGN feedback - theory

Wagner, A.~Y.,   Bicknell, G.~V.,   Umemura, M.,   Sutherland , R.~S.,   Silk, J.
February 2016  

Radiation hydrodynamic simulations of line-driven disk winds for ultra-fast outflows

Nomura, Mariko,   Ohsuga, Ken,   Takahashi, Hiroyuki R.,   Wada, Keiichi,   Yoshida, Tessei
February 2016   Publications of the Astronomical Society of Japan

Spectral Line Survey toward Molecular Clouds in the Large Magellanic Cloud

Nishimura, Yuri,   Shimonishi, Takashi,   Watanabe, Yoshimasa,   Sakai, Nami,   Aikawa, Yuri,   Kawamura, Akiko
February 2016   The Astrophysical Journal

Reconstructing the history of water ice formation from HDO/H$_2$O and D$_2$O/HDO ratios in protostellar cores

Furuya, K.,   van Dishoeck, E.~F.,   Aikawa, Y.
February 2016  

Water deuteration and ortho-to-para nuclear spin ratio of H$_2$ in molecular clouds formed via the accumulation of H I gas

Furuya, K.,   Aikawa, Y.,   Hincelin, U.,   Hassel, G.~E.,   Bergin, E.~A.,   Vasyunin, A.~I.
December 2015  

Double DCO$^+$ Rings Reveal CO Ice Desorption in the Outer Disk Around IM Lup

Öberg, Karin I.,   Furuya, Kenji,   Loomis, Ryan,   Aikawa, Yuri,   Andrews, Sean M.,   Qi, Chunhua
September 2015   The Astrophysical Journal

A new ray-tracing scheme for 3D diffuse radiation transfer on highly parallel architectures

Tanaka, Satoshi,   Yoshikawa, Kohji,   Okamoto, Takashi,   Hasegawa, Kenji
August 2015   Publications of the Astronomical Society of Japan

Early cosmic merger of multiple black holes

Tagawa, H.,   Umemura, M.,   Gouda, N.,   Yano, T.,   Yamai, Y.
August 2015   Monthly Notices of the Royal Astronomical Society

Light absorption efficiencies of photosynthetic pigments: the dependence on spectral types of central stars

Komatsu, Yu,   Umemura, Masayuki,   Shoji, Mitsuo,   Kayanuma, Megumi,   Yabana, Kazuhiro,   Shiraishi, Kenji
July 2015  

Analytical Formulae of Molecular Ion Abundances and the N$_2$H$^+$ Ring in Protoplanetary Disks

Aikawa, Yuri,   Furuya, Kenji,   Nomura, Hideko,   Qi, Chunhua
July 2015   The Astrophysical Journal

Light absorption and excitation energy transfer calculations in primitive photosynthetic bacteria

Komatsu, Yu,   Kayanuma, Megumi,   Shoji, Mitsuo,   Yabana, Kazuhiro,   Shiraishi, Kenji,   Umemura, Masayuki
June 2015  

IL-1 receptor antagonist-deficient mice develop autoimmune arthritis due to intrinsic activation of IL-17-producing CCR2$^+$V\ensuremathγ6$^+$\ensuremathγ\ensuremathδ T cells

Akitsu, Aoi,   Ishigame, Harumichi,   Kakuta, Shigeru,   Chung, Soo-Hyun,   Ikeda, Satoshi,   Shimizu, Kenji
June 2015  

Puzzling outer-density profile of the dark matter halo in the Andromeda galaxy

Kirihara, Takanobu,   Miki, Yohei,   Mori, Masao
December 2014   Publications of the Astronomical Society of Japan

Multi-dimensional Simulations of the Expanding Supernova Remnant of SN 1987A

Potter, T.~M.,   Staveley-Smith, L.,   Reville, B.,   Ng, C. -Y.,   Bicknell, G.~V.,   Sutherland, R.~S.
October 2014   The Astrophysical Journal

Jet-intracluster medium interaction in Hydra A - I. Estimates of jet velocity from inner knots

Nawaz, M.~A.,   Wagner, A.~Y.,   Bicknell, G.~V.,   Sutherland , R.~S.,   McNamara, B.~R.
October 2014   Monthly Notices of the Royal Astronomical Society

Transonic galactic outflows in a dark matter halo with a central black hole and its application to the Sombrero galaxy

Igarashi, Asuka,   Mori, Masao,   Nitta, Shin-ya
October 2014   Monthly Notices of the Royal Astronomical Society

The Core-Cusp Problem in Cold Dark Matter Halos and Supernova Feedback: Effects of Oscillation

Ogiya, Go,   Mori, Masao
September 2014   The Astrophysical Journal

On the evolution of gas clouds exposed to AGN radiation - I. Three-dimensional radiation hydrodynamic simulations

Namekata, D.,   Umemura, M.,   Hasegawa, K.
September 2014   Monthly Notices of the Royal Astronomical Society

Relics of Galaxy Merging: Observational Predictions for a Wandering Massive Black Hole and Accompanying Star Cluster in the Halo of M31

Kawaguchi, Toshihiro,   Saito, Yuriko,   Miki, Yohei,   Mori, Masao
July 2014   The Astrophysical Journal Letters

What is the Physical Origin of Strong Ly\ensuremathα Emission? I. Demographics of Ly\ensuremathα Emitter Structures

Shibuya, Takatoshi,   Ouchi, Masami,   Nakajima, Kimihiko,   Yuma, Suraphong,   Hashimoto, Takuya,   Shimasaku, Kazuhiro
April 2014   The Astrophysical Journal

Hunting a Wandering Supermassive Black Hole in the M31 Halo Hermitage

Miki, Yohei,   Mori, Masao,   Kawaguchi, Toshihiro,   Saito, Yuriko
March 2014   The Astrophysical Journal

First Systematic Search for Oxygen-line Blobs at High Redshift: Uncovering AGN Feedback and Star Formation Quenching

Yuma, Suraphong,   Ouchi, Masami,   Drake, Alyssa B.,   Simpson, Chris,   Shimasaku, Kazuhiro,   Nakajima, Kimihiko
December 2013   The Astrophysical Journal

Highly scalable implementation of an N-body code on a GPU cluster

Miki, Yohei,   Takahashi, Daisuke,   Mori, Masao
September 2013  

Transonic solutions of isothermal galactic winds in a cold dark matter halo

Tsuchiya, Masami,   Mori, Masao,   Nitta, Shin-ya
July 2013   Monthly Notices of the Royal Astronomical Society

Phantom-GRAPE: Numerical software library to accelerate collisionless N-body simulation with SIMD instruction set on x86 architecture

Tanikawa, Ataru,   Yoshikawa, Kohji,   Nitadori, Keigo,   Okamoto, Takashi
February 2013   New Astronomy

New Class of Very High Energy \ensuremathγ-Ray Emitters: Radio-dark Mini Shells Surrounding Active Galactic Nucleus Jets

Kino, Motoki,   Ito, Hirotaka,   Kawakatu, Nozomu,   Orienti, Monica
February 2013   The Astrophysical Journal

Direct Integration of the Collisionless Boltzmann Equation in Six-dimensional Phase Space: Self-gravitating Systems

Yoshikawa, Kohji,   Yoshida, Naoki,   Umemura, Masayuki
January 2013   The Astrophysical Journal

Ultrafast Outflows: Galaxy-scale Active Galactic Nucleus Feedback

Wagner, A.~Y.,   Umemura, M.,   Bicknell, G.~V.
January 2013   The Astrophysical Journal Letters

A high-resolution study of the X-ray emission and Sunyaev-Zel'dovich effect in the Bullet cluster (1E 0657-56)

Prokhorov, D.~A.,   Million, E.~T.,   Akahori, T.,   Zemcov, M.,   Moraghan, A.,   Nagataki, S.
November 2012   Monthly Notices of the Royal Astronomical Society

Kiloparsec-scale Radio Structures in Narrow-line Seyfert 1 Galaxies

Doi, Akihiro,   Nagira, Hiroshi,   Kawakatu, Nozomu,   Kino, Motoki,   Nagai, Hiroshi,   Asada, Keiichi
November 2012   The Astrophysical Journal

Imaging Simulations of the Sunyaev-Zel'dovich Effect for ALMA

Yamada, Kenkichi,   Kitayama, Tetsu,   Takakuwa, Shigehisa,   Iono, Daisuke,   Tsutsumi, Takahiro,   Kohno, Kotaro
October 2012   Publications of the Astronomical Society of Japan

Driving Outflows with Relativistic Jets and the Dependence of Active Galactic Nucleus Feedback Efficiency on Interstellar Medium Inhomogeneity

Wagner, A.~Y.,   Bicknell, G.~V.,   Umemura, M.
October 2012   The Astrophysical Journal

ORIGIN: metal creation and evolution from the cosmic dawn

den Herder, Jan-Willem,   Piro, Luigi,   Ohashi, Takaya,   Kouveliotou, Chryssa,   Hartmann, Dieter H.,   Kaastra, Jelle S.
October 2012  

Diffuse Ly\ensuremathα haloes around Ly\ensuremathα emitters at z=3: do dark matter distributions determine the Ly\ensuremathα spatial extents?

Matsuda, Y.,   Yamada, T.,   Hayashino, T.,   Yamauchi, R.,   Nakamura, Y.,   Morimoto, N.
September 2012   Monthly Notices of the Royal Astronomical Society

Calorimetry of Active Galactic Nucleus Jets: Testing Plasma Composition in Cygnus A

Kino, M.,   Kawakatu, N.,   Takahara, F.
June 2012   The Astrophysical Journal

Investigating Slim Disk Solutions for HLX-1 in ESO 243-49

Godet, O.,   Plazolles, B.,   Kawaguchi, T.,   Lasota, J. -P.,   Barret, D.,   Farrell, S.~A.
June 2012   The Astrophysical Journal

Profiles of Ly\ensuremathα Emission Lines of the Emitters at z = 3.1

Yamada, T.,   Matsuda, Y.,   Kousai, K.,   Hayashino, T.,   Morimoto, N.,   Umemura, M.
May 2012   The Astrophysical Journal

Panoramic Survey of Ly\ensuremathα Emitters at z = 3.1

Yamada, T.,   Nakamura, Y.,   Matsuda, Y.,   Hayashino, T.,   Yamauchi, R.,   Morimoto, N.
April 2012   The Astronomical Journal

N-body simulation for self-gravitating collisional systems with a new SIMD instruction set extension to the x86 architecture, Advanced Vector eXtensions

Tanikawa, Ataru,   Yoshikawa, Kohji,   Okamoto, Takashi,   Nitadori, Keigo
February 2012   New Astronomy

ARGOT: accelerated radiative transfer on grids using oct-tree

Okamoto, Takashi,   Yoshikawa, Kohji,   Umemura, Masayuki
February 2012   Monthly Notices of the Royal Astronomical Society

Stereo pairs in Astrophysics

Vogt, Frédéric,   Wagner, Alexander Y.
January 2012   Applied Surface Science

New method for exploring super-Eddington active galactic nuclei by near-infrared observations

Kawakatu, N.,   Ohsuga, K.
November 2011   Monthly Notices of the Royal Astronomical Society

A high-frequency study of the Sunyaev-Zel'dovich effect morphology in galaxy clusters

Prokhorov, D.~A.,   Colafrancesco, S.,   Akahori, T.,   Million, E.~T.,   Nagataki, S.,   Yoshikawa, K.
September 2011   Monthly Notices of the Royal Astronomical Society

Unveiling the 3D temperature structure of galaxy clusters by means of the thermal Sunyaev-Zel'dovich effect

Prokhorov, D.~A.,   Dubois, Y.,   Nagataki, S.,   Akahori, T.,   Yoshikawa, K.
August 2011   Monthly Notices of the Royal Astronomical Society

Near-infrared Reverberation by Dusty Clumpy Tori in Active Galactic Nuclei

Kawaguchi, Toshihiro,   Mori, Masao
August 2011   The Astrophysical Journal

The Core-Cusp Problem in Cold Dark Matter Halos and Supernova Feedback: Effects of Mass Loss

Ogiya, Go,   Mori, Masao
July 2011   The Astrophysical Journal Letters

Can electron distribution functions be derived through the Sunyaev-Zel'dovich effect?

Prokhorov, D.~A.,   Colafrancesco, S.,   Akahori, T.,   Yoshikawa, K.,   Nagataki, S.,   Seon, K. -I.
May 2011  

Evolution of Non-thermal Shell Emission Associated with Active Galactic Nucleus Jets

Ito, Hirotaka,   Kino, Motoki,   Kawakatu, Nozomu,   Yamada, Shoichi
April 2011   The Astrophysical Journal

Infrared 3-4\ensuremathμm Spectroscopy of Nearby PG QSOs and AGN-Nuclear Starburst Connections in High-luminosity AGN Populations

Imanishi, Masatoshi,   Ichikawa, Kohei,   Takeuchi, Tomoe,   Kawakatu, Nozomu,   Oi, Nagisa,   Imase, Keisuke
March 2011   Publications of the Astronomical Society of Japan

Successive Merger of Multiple Massive Black Holes in a Primordial Galaxy

Tanikawa, A.,   Umemura, M.
February 2011   The Astrophysical Journal Letters

The Subaru Ly\ensuremathα blob survey: a sample of 100-kpc Ly\ensuremathα blobs at z = 3

Matsuda, Y.,   Yamada, T.,   Hayashino, T.,   Yamauchi, R.,   Nakamura, Y.,   Morimoto, N.
January 2011   Monthly Notices of the Royal Astronomical Society

Orientation Effects on the Inner Region of Dusty Torus of Active Galactic Nuclei

Kawaguchi, Toshihiro,   Mori, Masao
December 2010   The Astrophysical Journal Letters

Long-term Spectral Variations of Ultraluminous X-ray Sources in the Interacting Galaxy Systems M 51 and NGC 4490/85

Yoshida, Tessei,   Ebisawa, Ken,   Matsushita, Kyoko,   Tsujimoto, Masahiro,   Kawaguchi, Toshihiro
October 2010   The Astrophysical Journal

START: smoothed particle hydrodynamics with tree-based accelerated radiative transfer

Hasegawa, K.,   Umemura, M.
October 2010   Monthly Notices of the Royal Astronomical Society

Two types of Lyman \ensuremathα emitters envisaged from hierarchical galaxy formation

Shimizu, Ikkoh,   Umemura, Masayuki
August 2010   Monthly Notices of the Royal Astronomical Society

Hydrodynamic Simulations of Merging Galaxy Clusters: Non-Equilibrium Ionization State and Two-Temperature Structure

Akahori, Takuya,   Yoshikawa, Kohji
April 2010   Publications of the Astronomical Society of Japan

Three-dimensional radiative properties of hot accretion flows on to the Galactic Centre black hole

Kato, Y.,   Umemura, M.,   Ohsuga, K.
December 2009   Monthly Notices of the Royal Astronomical Society

Cosmological radiative transfer comparison project - II. The radiation-hydrodynamic tests

Iliev, Ilian T.,   Whalen, Daniel,   Mellema, Garrelt,   Ahn, Kyungjin,   Baek, Sunghye,   Gnedin, Nickolay Y.
December 2009   Monthly Notices of the Royal Astronomical Society

The escape of ionizing photons from supernova-dominated primordial galaxies

Yajima, Hidenobu,   Umemura, Masayuki,   Mori, Masao,   Nakamoto, Taishi
September 2009   Monthly Notices of the Royal Astronomical Society

Formation Criteria and the Mass of Secondary Population III Stars

Susa, Hajime,   Umemura, Masayuki,   Hasegawa, Kenji
September 2009   The Astrophysical Journal

Formation of globular clusters induced by external ultraviolet radiation

Hasegawa, Kenji,   Umemura, Masayuki,   Kitayama, Tetsu
August 2009   Monthly Notices of the Royal Astronomical Society

Global Radiation-Magnetohydrodynamic Simulations of Black-Hole Accretion Flow and Outflow: Unified Model of Three States

Ohsuga, Ken,   Mineshige, Shin,   Mori, Masao,   Kato, Yoshiaki
June 2009   Publications of the Astronomical Society of Japan

Radiative regulation of Population III star formation

Hasegawa, K.,   Umemura, M.,   Susa, H.
May 2009   Monthly Notices of the Royal Astronomical Society

Modeling Nonlinear Evolution of Baryon Acoustic Oscillations: Convergence Regime of N-body Simulations and Analytic Models

Nishimichi, Takahiro,   Shirata, Akihito,   Taruya, Atsushi,   Yahata, Kazuhiro,   Saito, Shun,   Suto, Yasushi
February 2009   Publications of the Astronomical Society of Japan

Kinematic and Chemical Constraints on the Formation of M31's Inner and Outer Halo

Koch, Andreas,   Rich, R. Michael,   Reitzel, David B.,   Martin, Nicolas F.,   Ibata, Rodrigo A.,   Chapman, Scott C.
December 2008   The Astrophysical Journal

Suzaku broad-band spectroscopy of RX J1347.5-1145: constraints on the extremely hot gas and non-thermal emission

Ota, N.,   Murase, K.,   Kitayama, T.,   Komatsu, E.,   Hattori, M.,   Matsuo, H.
November 2008  

Non-Equilibrium Ionization State and Two-Temperature Structure in the Linked Region of Abell 399 and Abell 401

Akahori, Takuya,   Yoshikawa, Kohji
August 2008   Publications of the Astronomical Society of Japan

The impact of a supernova explosion in a very massive binary

Sato, Jun'ichi,   Umemura, Masayuki,   Sawada, Keisuke
July 2008   Monthly Notices of the Royal Astronomical Society

Nuclear/Circumnuclear Starbursts and Active Galactic Nucleus Mass Accretion in Seyfert Galaxies

Watabe, Yasuyuki,   Kawakatu, Nozomu,   Imanishi, Masatoshi
April 2008   The Astrophysical Journal

Coevolution and Downsizing of Supermassive Black Holes and Galactic Bulges

Umemura, Masayuki
January 2008  

Galactic winds from primeval galaxies

Mori, Masao,   Umemura, Masayuki
October 2007   Applied Surface Science

Large-scale structure of short-lived Lyman \ensuremathα emitters

Shimizu, Ikkoh,   Umemura, Masayuki,   Yonehara, Atsunori
September 2007   Monthly Notices of the Royal Astronomical Society

Luminosity Functions of Lyman Break Galaxies at zåisebox-0.5ex~4 and z\i̊sebox-0.5ex~5 in the Subaru Deep Field

Yoshida, Makiko,   Shimasaku, Kazuhiro,   Kashikawa, Nobunari,   Ouchi, Masami,   Okamura, Sadanori,   Ajiki, Masaru
December 2006   The Astrophysical Journal

Formation of SMBHs and QSO evolution

Kawakatu, Nozomu,   Anabuki, Naohisa,   Nagao, Tohru,   Umemura, Masayuki,   Nakagawa, Takao,   Mori, Masao
November 2006   New Astronomy Reviews

Imprint of Gravitational Lensing by Population III Stars in Gamma-Ray Burst Light Curves

Hirose, Y.,   Umemura, M.,   Yonehara, A.,   Sato, J.
October 2006   The Astrophysical Journal

The End of the Reionization Epoch Probed by Ly\ensuremathα Emitters at z = 6.5 in the Subaru Deep Field

Kashikawa, Nobunari,   Shimasaku, Kazuhiro,   Malkan, Matthew A.,   Doi, Mamoru,   Matsuda, Yuichi,   Ouchi, Masami
September 2006   The Astrophysical Journal

Cosmological radiative transfer codes comparison project - I. The static density field tests

Iliev, Ilian T.,   Ciardi, Benedetta,   Alvarez, Marcelo A.,   Maselli, Antonella,   Ferrara, Andrea,   Gnedin, Nickolay Y.
September 2006   Monthly Notices of the Royal Astronomical Society

Secondary Star Formation in a Population III Object

Susa, Hajime,   Umemura, Masayuki
July 2006   The Astrophysical Journal Letters

The evolution of galaxies from primeval irregulars to present-day ellipticals

Mori, Masao,   Umemura, Masayuki
March 2006   Nature

Early metal enrichment and Lyman \ensuremathα emission

Mori, Masao,   Umemura, Masayuki
March 2006   New Astronomy Reviews

Clustering of Lyman Break Galaxies at z = 4 and 5 in the Subaru Deep Field: Luminosity Dependence of the Correlation Function Slope

Kashikawa, Nobunari,   Yoshida, Makiko,   Shimasaku, Kazuhiro,   Nagashima, Masahiro,   Yahagi, Hideki,   Ouchi, Masami
February 2006   The Astrophysical Journal

The Formation of Population III Binaries

Saigo, Kazuya,   Matsumoto, Tomoaki,   Umemura, Masayuki
November 2004   The Astrophysical Journal Letters

Gas stripping by radiation drag from an interstellar cloud

Sato, Jun'ichi,   Umemura, Masayuki,   Sawada, Keisuke,   Matsuyama, Shingo
October 2004   Monthly Notices of the Royal Astronomical Society

A Strong Ly\ensuremathα Emitter at z = 6.33 in the Subaru Deep Field Selected as an i'-Dropout

Nagao, T.,   Taniguchi, Y.,   Kashikawa, N.,   Kodaira, K.,   Kaifu, N.,   Ando, H.
September 2004   The Astrophysical Journal Letters

The Effects of Early Cosmic Reionization on the Substructure Problem in Galactic Halos

Susa, Hajime,   Umemura, Masayuki
July 2004   The Astrophysical Journal Letters

Multiple Supernova Explosions in a Forming Galaxy

Mori, Masao,   Umemura, Masayuki,   Ferrara, Andrea
January 2004   Publications of the Astronomical Society of Australia

Why Are Massive Black Holes Small in Disk Galaxies?

Kawakatu, Nozomu,   Umemura, Masayuki
January 2004   The Astrophysical Journal Letters

The Discovery of Two Lyman \ensuremathα Emitters beyond Redshift 6 in the Subaru Deep Field

Kodaira, Keiichi,   Taniguchi, Yoshiaki,   Kashikawa, Nobunari,   Kaifu, Norio,   Ando, Hiroyasu,   Karoji, Hiroshi
April 2003   Publications of the Astronomical Society of Japan

A Spectrophotometric Method to Determine the Inclination of Class I Objects

Nakazato, Takeshi,   Nakamoto, Taishi,   Umemura, Masayuki
January 2003   The Astrophysical Journal

Protoquasars: Physical States and Observable Properties

Kawakatu, Nozomu,   Umemura, Masayuki,   Mori, Masao
January 2003   The Astrophysical Journal

A Search for Ly\ensuremathα Emitters at Redshift 3.7

Fujita, Shinobu S.,   Ajiki, Masaru,   Shioya, Yasuhiro,   Nagao, Tohru,   Murayama, Takashi,   Taniguchi, Yoshiaki
January 2003   The Astronomical Journal

Does the Slim-Disk Model Correctly Consider Photon-trapping Effects?

Ohsuga, Ken,   Mineshige, Shin,   Mori, Masao,   Umemura, Masayuki
July 2002   The Astrophysical Journal

The Stellar Initial Mass Function in Primordial Galaxies

Nakamura, Fumitaka,   Umemura, Masayuki
April 2002   The Astrophysical Journal

Radiation drag driven mass accretion in a clumpy interstellar medium: implications for the supermassive black hole-to-bulge relation

Kawakatu, Nozomu,   Umemura, Masayuki
January 2002   Monthly Notices of the Royal Astronomical Society

A Radiation-Hydrodynamical Model for Supermassive Black Hole-to-Bulge Mass Relation and Quasar Formation

Umemura, Masayuki
October 2001   The Astrophysical Journal Letters

Criteria for the formation of Population III objects in the ultraviolet background radiation

Kitayama, T.,   Susa, H.,   Umemura, M.,   Ikeuchi, S.
October 2001   Monthly Notices of the Royal Astronomical Society

Theoretical Models of Multi-Waveband QSO Luminosity Functions

Hosokawa, Takashi,   Mineshige, Shin,   Kawaguchi, Toshihiro,   Yoshikawa, Kohji,   Umemura, Masayuki
October 2001   Publications of the Astronomical Society of Japan

Formation of Obscuring Walls by the Radiation Force from Circumnuclear Starbursts and the Implications for the Starburst-Active Galactic Nucleus Connection

Ohsuga, Ken,   Umemura, Masayuki
September 2001   The Astrophysical Journal

Circumnuclear obscuration of the Circinus galaxy by a starburst-radiation supported wall

Ohsuga, K.,   Umemura, M.
June 2001  

The effects of radiative transfer on the reionization of an inhomogeneous universe

Nakamoto, Taishi,   Umemura, Masayuki,   Susa, Hajime
March 2001   Monthly Notices of the Royal Astronomical Society

On the Initial Mass Function of Population III Stars

Nakamura, Fumitaka,   Umemura, Masayuki
February 2001   The Astrophysical Journal

Ultraviolet-background-induced bifurcation of galactic morphology

Susa, Hajime,   Umemura, Masayuki
August 2000   Monthly Notices of the Royal Astronomical Society

Formation of Primordial Galaxies under Ultraviolet Background Radiation

Susa, Hajime,   Umemura, Masayuki
July 2000   The Astrophysical Journal

Radiation-hydrodynamical collapse of pre-galactic clouds in the ultraviolet background

Kitayama, T.,   Tajiri, Y.,   Umemura, M.,   Susa, H.,   Ikeuchi, S.
June 2000   Monthly Notices of the Royal Astronomical Society

An X-ray microlensing test of AU-scale quasar disk structure

Yonehara, A.,   Mineshige, S.,   Manmoto, T.,   Fukue, J.,   Umemura, M.,   Turner, E.~L.
January 2000  

Formation of Large-Scale Obscuring Wall and Active Galactic Nucleus Evolution Regulated by Circumnuclear Starbursts

Ohsuga, Ken,   Umemura, Masayuki
August 1999   The Astrophysical Journal Letters

Radiation Hydrodynamical Mass Accretion onto Galactic Nuclei Driven by Circumnuclear Starbursts

Ohsuga, Ken,   Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
June 1999   Publications of the Astronomical Society of Japan

On the Mass of Population III Stars

Nakamura, Fumitaka,   Umemura, Masayuki
April 1999   The Astrophysical Journal

Microlens diagnostics of accretion disks in active galactic nuclei

Yonehara, A.,   Mineshige, S.,   Fukue, J.,   Umemura, M.,   Turner, E.~L.
March 1999  

AGN activity triggered by circumnuclear starbursts

Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
January 1999  

Hydrodynamical evolution of AGN driven by radiation from circumnuclear starbursts

Ohsuga, Ken,   Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
January 1999  

Radiatively driven mass accretion on to galactic nuclei by circumnuclear starbursts

Umemura, Masayuki,   Fukue, Jun,   Mineshige, Shin
October 1998   Monthly Notices of the Royal Astronomical Society

Optical Variability in Active Galactic Nuclei: Starbursts or Disk Instabilities?

Kawaguchi, T.,   Mineshige, S.,   Umemura, M.,   Turner, Edwin L.
September 1998   The Astrophysical Journal

An X-Ray Microlensing Test of AU-Scale Accretion Disk Structure in Q2237+0305

Yonehara, Atsunori,   Mineshige, Shin,   Manmoto, Tadahiro,   Fukue, Jun,   Umemura, Masayuki,   Turner, Edwin L.
July 1998   The Astrophysical Journal Letters

A Criterion for Photoionization of Pregalactic Clouds Exposed to Diffuse Ultraviolet Background Radiation

Tajiri, Yukiko,   Umemura, Masayuki
July 1998   The Astrophysical Journal

Angular Momentum Transport in Early-formed Objects by Cosmic Background Radiation: Radiation-hydrodynamical Approach

Tsuribe, Tohru,   Umemura, Masayuki
September 1997   The Astrophysical Journal

Self-Similar Viscous Collapse of a Self-Gravitating, Polytropic Gas Disk

Mineshige, Shin,   Nakayama, Kunji,   Umemura, Masayuki
August 1997   Publications of the Astronomical Society of Japan

Very Strong Microlensing of Distant Luminous Stars by Relic Massive Black Holes

Turner, Edwin L.,   Umemura, Masayuki
July 1997   The Astrophysical Journal

Self-similar Collapse of a Self-gravitating Viscous Disk

Mineshige, Shin,   Umemura, Masayuki
May 1997   The Astrophysical Journal