研究成果・発表論文

FOREVER22: galaxy formation in protocluster regions

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Yajima, Hidenobu,   Abe, Makito,   Khochfar, Sadegh,   Nagamine, Kentaro,   Inoue, Akio K.,   Kodama, Tadayuki

We present results from a new cosmological hydrodynamics simulation campaign of protocluster (PC) regions, FOREVER22: FORmation and EVolution of galaxies in Extremely overdense Regions motivated by SSA22. The simulations cover a wide range of cosmolo...

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

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Meenakshi, Moun,   Mukherjee, Dipanjan,   Wagner, Alexander Y.,   Nesvadba, Nicole P.~H.,   Morganti, Raffaella,   Janssen, Reinier M.~J.

We use the results of relativistic hydrodynamic simulations of jet- interstellar medium (ISM) interactions in a galaxy with a radio- loud AGN to quantify the extent of ionization in the central few kpcs of the gaseous galactic disc. We perform post-p...

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

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Fukushima, Hajime,   Yajima, Hidenobu

We study the formation of star clusters in molecular clouds by performing three-dimensional radiation hydrodynamics simulations with far ultraviolet (FUV; 6 eV≦hν≦13.6 eV) and extreme ultraviolet (EUV; hν≧13.6 eV) radiative feedback. We find that the...

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

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Tokuda, Kazuki,   Kondo, Hiroshi,   Ohno, Takahiro,   Konishi, Ayu,   Sano, Hidetoshi,   Tsuge, Kisetsu

We have analyzed the data from a large-scale CO survey toward the northern region of the Small Magellanic Cloud (SMC) obtained with the Atacama Compact Array (ACA) stand-alone mode of ALMA. The primary aim of this study is to comprehensively understa...

Tracing the Ionization Structure of the Shocked Filaments of NGC 6240

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Medling, Anne M.,   Kewley, Lisa J.,   Calzetti, Daniela,   Privon, George C.,   Larson, Kirsten,   Rich, Jeffrey A.

We study the ionization and excitation structure of the interstellar medium in the late-stage gas-rich galaxy merger NGC 6240 using a suite of emission-line maps at ~25 pc resolution from the Hubble Space Telescope, Keck/NIRC2 with Adaptive Optics, a...

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

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Mandal, Ankush,   Mukherjee, Dipanjan,   Federrath, Christoph,   Nesvadba, Nicole P.~H.,   Bicknell, Geoffrey V.,   Wagner, Alexander Y.

We apply a turbulence-regulated model of star formation to calculate the star formation rate (SFR) of dense star-forming clouds in simulations of jet-interstellar medium (ISM) interactions. The method isolates individual clumps and accounts for the i...

Tracing the Milky Way's Vestigial Nuclear Jet

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Cecil, Gerald,   Wagner, Alexander Y.,   Bland-Hawthorn, Joss,   Bicknell, Geoffrey V.,   Mukherjee, Dipanjan

MeerKAT radio continuum and XMM-Newton X-ray images have recently revealed a spectacular bipolar channel at the Galactic Center that spans several degrees (~0.5 kpc). An intermittent jet likely formed this channel and is consistent with earlier evide...

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

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Abe, Makito,   Yajima, Hidenobu,   Khochfar, Sadegh,   Dalla Vecchia, Claudio,   Omukai, Kazuyuki

We perform high-resolution cosmological hydrodynamic simulations to study the formation of the first galaxies that reach the masses of 108-9 h-1 M⊙ at z = 9. The resolution of the simulations is high enough to resolve minihaloes and allow us to succe...

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FOREVER22: galaxy formation in protocluster regions

Yajima, Hidenobu,   Abe, Makito,   Khochfar, Sadegh,   Nagamine, Kentaro,   Inoue, Akio K.,   Kodama, Tadayuki

We present results from a new cosmological hydrodynamics simulation campaign of protocluster (PC) regions, FOREVER22: FORmation and EVolution of galaxies in Extremely overdense Regions motivated by SSA22. The simulations cover a wide range of cosmolo...

令和4年 1月   Monthly Notices of the Royal Astronomical Society
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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.

We use the results of relativistic hydrodynamic simulations of jet- interstellar medium (ISM) interactions in a galaxy with a radio- loud AGN to quantify the extent of ionization in the central few kpcs of the gaseous galactic disc. We perform post-p...

令和4年 1月   Monthly Notices of the Royal Astronomical Society
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Far and extreme UV radiation feedback in molecular clouds and its influence on the mass and size of star clusters

Fukushima, Hajime,   Yajima, Hidenobu

We study the formation of star clusters in molecular clouds by performing three-dimensional radiation hydrodynamics simulations with far ultraviolet (FUV; 6 eV≦hν≦13.6 eV) and extreme ultraviolet (EUV; hν≧13.6 eV) radiative feedback. We find that the...

令和4年 1月   Monthly Notices of the Royal Astronomical Society
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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

We have analyzed the data from a large-scale CO survey toward the northern region of the Small Magellanic Cloud (SMC) obtained with the Atacama Compact Array (ACA) stand-alone mode of ALMA. The primary aim of this study is to comprehensively understa...

令和3年 12月   The Astrophysical Journal
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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.

We study the ionization and excitation structure of the interstellar medium in the late-stage gas-rich galaxy merger NGC 6240 using a suite of emission-line maps at ~25 pc resolution from the Hubble Space Telescope, Keck/NIRC2 with Adaptive Optics, a...

令和3年 12月   The Astrophysical Journal
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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.

We apply a turbulence-regulated model of star formation to calculate the star formation rate (SFR) of dense star-forming clouds in simulations of jet-interstellar medium (ISM) interactions. The method isolates individual clumps and accounts for the i...

令和3年 12月   Monthly Notices of the Royal Astronomical Society
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Tracing the Milky Way's Vestigial Nuclear Jet

Cecil, Gerald,   Wagner, Alexander Y.,   Bland-Hawthorn, Joss,   Bicknell, Geoffrey V.,   Mukherjee, Dipanjan

MeerKAT radio continuum and XMM-Newton X-ray images have recently revealed a spectacular bipolar channel at the Galactic Center that spans several degrees (~0.5 kpc). An intermittent jet likely formed this channel and is consistent with earlier evide...

令和3年 12月   The Astrophysical Journal
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Formation of the first galaxies in the aftermath of the first supernovae

Abe, Makito,   Yajima, Hidenobu,   Khochfar, Sadegh,   Dalla Vecchia, Claudio,   Omukai, Kazuyuki

We perform high-resolution cosmological hydrodynamic simulations to study the formation of the first galaxies that reach the masses of 108-9 h-1 M⊙ at z = 9. The resolution of the simulations is high enough to resolve minihaloes and allow us to succe...

令和3年 12月   Monthly Notices of the Royal Astronomical Society
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Internal R-process Abundance Spread of M15 and a Single Stellar Population Model

Tarumi, Yuta,   Yoshida, Naoki,   Inoue, Shigeki

The member stars in globular cluster M15 show a substantial spread in the abundances of r-process elements. We argue that a rare and prolific r-process event enriched the natal cloud of M15 in an inhomogeneous manner. To critically examine the possib...

令和3年 11月   The Astrophysical Journal Letters
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Resolved simulations of jet-ISM interaction: Implications for gas dynamics and star formation

Mukherjee, Dipanjan,   Bicknell, Geoffrey V.,   Wagner, Alexander Y.

Relativistic jets can interact with the ambient gas distribution of the host galaxy, before breaking out to larger scales. In the past decade, several studies have simulated jet-driven outflows to understand how they affect the nearby environment, an...

令和3年 11月   Astronomische Nachrichten
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Fragmentation of ring galaxies and transformation to clumpy galaxies

Inoue, Shigeki,   Yoshida, Naoki,   Hernquist, Lars

We study the fragmentation of collisional ring galaxies (CRGs) using a linear perturbation analysis that computes the physical conditions of gravitational instability, as determined by the balance of self-gravity of the ring against pressure and Cori...

令和3年 11月   Monthly Notices of the Royal Astronomical Society
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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

We present the optical and infrared properties of 39 extremely radio- loud galaxies discovered by cross-matching the Subaru/Hyper Suprime-Cam (HSC) deep optical imaging survey and VLA/FIRST 1.4 GHz radio survey. The recent Subaru/HSC strategic survey...

令和3年 11月   The Astrophysical Journal
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Radiation hydrodynamics simulations of line-driven AGN disc winds: metallicity dependence and black hole growth

Nomura, Mariko,   Omukai, Kazuyuki,   Ohsuga, Ken

Growth of the black holes (BHs) from the seeds to supermassive BHs (SMBHs, ~109M⊙) is not understood, but the mass accretion must have played an important role. We performed 2D radiation hydrodynamics simulations of line-driven disc winds considering...

令和3年 10月   Monthly Notices of the Royal Astronomical Society
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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.

It has long been suspected that powerful radio sources may lower the efficiency with which stars form from the molecular gas in their host galaxy, however so far, alternative mechanisms, in particular related to the stellar mass distribution in the m...

令和3年 10月   Astronomy & Astrophysics
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Radiation hydrodynamics simulations of massive star cluster formation in giant molecular clouds

Fukushima, Hajime,   Yajima, Hidenobu

By performing 3D radiation hydrodynamics simulations, we study the formation of young massive star clusters (YMCs; M* > 104 M⊙) in clouds with the surface density ranging from Σcl = 80 to 3200 M⊙ pc-2. We find that photoionization feedback suppresses...

令和3年 10月   Monthly Notices of the Royal Astronomical Society
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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.

Galactic winds are crucial to the cosmic cycle of matter, transporting material out of the dense regions of galaxies. Observations show the coexistence of different temperature phases in such winds, which is not easy to explain. We present a set of 3...

令和3年 10月   Monthly Notices of the Royal Astronomical Society

FOREVER22: galaxy formation in protocluster regions

Yajima, Hidenobu,   Abe, Makito,   Khochfar, Sadegh,   Nagamine, Kentaro,   Inoue, Akio K.,   Kodama, Tadayuki
令和4年 1月   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.
令和4年 1月   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
令和4年 1月   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
令和3年 12月   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.
令和3年 12月   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.
令和3年 12月   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
令和3年 12月   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
令和3年 12月   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
令和3年 11月   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.
令和3年 11月   Astronomische Nachrichten

Fragmentation of ring galaxies and transformation to clumpy galaxies

Inoue, Shigeki,   Yoshida, Naoki,   Hernquist, Lars
令和3年 11月   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
令和3年 11月   The Astrophysical Journal

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

Nomura, Mariko,   Omukai, Kazuyuki,   Ohsuga, Ken
令和3年 10月   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.
令和3年 10月   Astronomy & Astrophysics

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

Fukushima, Hajime,   Yajima, Hidenobu
令和3年 10月   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.
令和3年 10月   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
令和3年 9月   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
令和3年 8月   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
令和3年 8月   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
令和3年 5月   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
令和3年 5月   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
令和3年 4月   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
令和2年 12月   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
令和2年 12月   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.
令和2年 12月   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
令和2年 12月   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.
令和2年 12月   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
令和2年 11月   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
令和2年 11月   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
令和2年 10月   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
令和2年 10月   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
令和2年 9月   Monthly Notices of the Royal Astronomical Society