FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions
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 ...
Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality
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 t...
The formation of globular clusters with top-heavy initial mass functions
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)ofstarsformedinlo...
FOREVER22: The first bright galaxies with population III stars at redshifts z ≈ 10-20 and comparisons with JWST data
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 observe...
Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data
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) quasar...
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
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,...
EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs
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 Se...
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?
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 ...
FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions
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 ...
令和5年 9月 Monthly Notices of the Royal Astronomical Society
Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality
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 t...
令和5年 9月 Monthly Notices of the Royal Astronomical Society
The formation of globular clusters with top-heavy initial mass functions
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)ofstarsformedinlo...
令和5年 9月 Monthly Notices of the Royal Astronomical Society
FOREVER22: The first bright galaxies with population III stars at redshifts z ≈ 10-20 and comparisons with JWST data
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 observe...
令和5年 8月 Monthly Notices of the Royal Astronomical Society
Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data
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) quasar...
令和5年 7月 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
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,...
令和5年 7月 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
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 Se...
令和5年 7月 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?
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 ...
令和5年 7月 The Astrophysical Journal
Modeling of Thermal Emission from ULX Pulsar Swift J0243.6+6124 with General Relativistic Radiation MHD Simulations
We perform general relativistic radiation magnetohydrodynamics simulations of super-Eddington accretion flows around a neutron star with a dipole magnetic field for modeling the Galactic ultraluminous X-ray source exhibiting X-ray pulsations, Swift J...
令和5年 7月 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
The nature of molecular clouds and their statistical behavior in subsolar metallicity environments are not fully explored yet. We analyzed data from an unbiased CO (J = 2-1) survey at the spatial resolution of ~ 2 pc in the northern region of the Sma...
令和5年 6月 The Astrophysical Journal
3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar
Direct collapse of supermassive stars is a possible pathway to form supermassive black hole seeds at high redshifts. Whereas previous three-dimensional (3D) simulations demonstrate that supermassive stars form via rapid mass accretion, those resolvin...
令和5年 6月 The Astrophysical Journal
RAIKOU (): A General Relativistic, Multiwavelength Radiative Transfer Code
We present a general relativistic radiative transfer code RAIKOU () for multiwavlength studies of spectra and images including the black hole shadows around Kerr black holes. Important radiative processes in hot plasmas around black holes, i.e., (cyc...
令和5年 6月 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
We present integral field, far-infrared (FIR) spectroscopy of Mrk 54, a local Lyman continuum emitter, obtained with FIFI-LS on the Stratospheric Observatory for Infrared Astronomy. This is only the second time, after Haro 11, that [C II] 158 μm and ...
令和5年 5月 The Astrophysical Journal
UV and Lyα Halos of Lyα Emitters across Environments at z = 2.84
We present UV and Lyα radial surface brightness (SB) profiles of Lyα emitters (LAEs) at z = 2.84 detected with the Hyper Suprime-Cam on the Subaru Telescope. The depth of our data, together with the wide-field coverage including a protocluster, enabl...
令和5年 4月 The Astrophysical Journal
The ultraviolet (UV) bright accretion disc in active galactic nuclei (AGNs) should give rise to line driving, producing a powerful wind that may play an important role in AGN feedback as well as in producing structures like the broad-line region. How...
令和5年 1月 Monthly Notices of the Royal Astronomical Society
In order to evaluate the impacts made by super-Eddington accretors on their environments precisely, it is essential to guarantee a large enough simulation box and long computational time to avoid any artefacts from numerical settings as much as possi...
令和4年 12月 Publications of the Astronomical Society of JapanFOREVER22: Gas and metal outflow from massive galaxies in protocluster regions
Generation of high circular polarization of interstellar Lyman α radiation triggering biological homochirality
The formation of globular clusters with top-heavy initial mass functions
FOREVER22: The first bright galaxies with population III stars at redshifts z ≈ 10-20 and comparisons with JWST data
Cosmological-scale Lyα Forest Absorption around Galaxies and AGNs Probed with the HETDEX and SDSS Spectroscopic Data
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
EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs
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?
Modeling of Thermal Emission from ULX Pulsar Swift J0243.6+6124 with General Relativistic Radiation MHD Simulations
An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog
3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar
RAIKOU (): A General Relativistic, Multiwavelength Radiative Transfer Code
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
UV and Lyα Halos of Lyα Emitters across Environments at z = 2.84
FOREVER22: Gas and metal outflow from massive galaxies in protocluster regions
Harada, Naoki, Yajima, Hidenobu, Abe, Makito , 令和5年 9月 , Monthly Notices of the Royal Astronomical SocietyGeneration of high circular polarization of interstellar Lyman α radiation triggering biological homochirality
Fukushima, Hajime, Yajima, Hidenobu, Umemura, Masayuki , 令和5年 9月 , Monthly Notices of the Royal Astronomical SocietyThe formation of globular clusters with top-heavy initial mass functions
Fukushima, Hajime, Yajima, Hidenobu , 令和5年 9月 , Monthly Notices of the Royal Astronomical SocietyFOREVER22: 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 ... , 令和5年 8月 , Monthly Notices of the Royal Astronomical SocietyCosmological-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 ... , 令和5年 7月 , The Astrophysical JournalMorphologies 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 ... , 令和5年 7月 , The Astrophysical JournalEMPRESS. 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 ... , 令和5年 7月 , The Astrophysical JournalEMPRESS. 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. ... , 令和5年 7月 , The Astrophysical JournalModeling 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 , 令和5年 7月 , The Astrophysical JournalAn 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 ... , 令和5年 6月 , The Astrophysical Journal3D Radiation-hydrodynamic Simulations Resolving Interior of Rapidly Accreting Primordial Protostar
Kimura, Kazutaka, Hosokawa, Takashi, Sugimura, Kazuyuki, Fukushima, Hajime , 令和5年 6月 , The Astrophysical JournalRAIKOU (): A General Relativistic, Multiwavelength Radiative Transfer Code
Kawashima, Tomohisa, Ohsuga, Ken, Takahashi, Hiroyuki R. , 令和5年 6月 , The Astrophysical JournalDetections 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 ... , 令和5年 5月 , The Astrophysical JournalUV 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 ... , 令和5年 4月 , The Astrophysical Journal
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