研究成果・発表論文

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

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Yoshida, Makiko,   Shimasaku, Kazuhiro,   Kashikawa, Nobunari,   Ouchi, Masami,   Okamura, Sadanori,   Ajiki, Masaru

We investigate the luminosity functions of Lyman break galaxies (LBGs) at zåisebox-0.5ex~4 and z\i̊sebox-0.5ex~5 based on optical imaging data obtained in the Subaru Deep Field project. Three samples of LBGs in a contiguous area of 875 arcmin$^2$ are...

Formation of SMBHs and QSO evolution

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Kawakatu, Nozomu,   Anabuki, Naohisa,   Nagao, Tohru,   Umemura, Masayuki,   Nakagawa, Takao,   Mori, Masao

The formation and growth of supermassive black holes (SMBHs) physically linked with bulges are considered. We focus on the radiation hydrodynamic process for the growth of SMBH in the optically thick starburst phase, where radiation from bulge stars ...

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

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Hirose, Y.,   Umemura, M.,   Yonehara, A.,   Sato, J.

We propose a novel method of extracting the imprint of gravitational lensing by Population III stars in the light curves of gamma-ray bursts (GRBs). Significant portions of GRBs can originate in hypernovae of Population III stars and be gravitational...

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

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Kashikawa, Nobunari,   Shimasaku, Kazuhiro,   Malkan, Matthew A.,   Doi, Mamoru,   Matsuda, Yuichi,   Ouchi, Masami

We report an extensive search for Ly\ensuremathα emitters (LAEs) at z=6.5 in the Subaru Deep Field. Subsequent spectroscopy with Subaru and Keck identified eight more LAEs, giving a total of 17 spectroscopically confirmed LAEs at z=6.5. Based on this...

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

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Iliev, Ilian T.,   Ciardi, Benedetta,   Alvarez, Marcelo A.,   Maselli, Antonella,   Ferrara, Andrea,   Gnedin, Nickolay Y.

Radiative transfer (RT) simulations are now at the forefront of numerical astrophysics. They are becoming crucial for an increasing number of astrophysical and cosmological problems; at the same time their computational cost has come within reach of ...

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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

We investigate the luminosity functions of Lyman break galaxies (LBGs) at zåisebox-0.5ex~4 and z\i̊sebox-0.5ex~5 based on optical imaging data obtained in the Subaru Deep Field project. Three samples of LBGs in a contiguous area of 875 arcmin$^2$ are...

平成18年 12月   The Astrophysical Journal
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Formation of SMBHs and QSO evolution

Kawakatu, Nozomu,   Anabuki, Naohisa,   Nagao, Tohru,   Umemura, Masayuki,   Nakagawa, Takao,   Mori, Masao

The formation and growth of supermassive black holes (SMBHs) physically linked with bulges are considered. We focus on the radiation hydrodynamic process for the growth of SMBH in the optically thick starburst phase, where radiation from bulge stars ...

平成18年 11月   New Astronomy Reviews
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Imprint of Gravitational Lensing by Population III Stars in Gamma-Ray Burst Light Curves

Hirose, Y.,   Umemura, M.,   Yonehara, A.,   Sato, J.

We propose a novel method of extracting the imprint of gravitational lensing by Population III stars in the light curves of gamma-ray bursts (GRBs). Significant portions of GRBs can originate in hypernovae of Population III stars and be gravitational...

平成18年 10月   The Astrophysical Journal
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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

We report an extensive search for Ly\ensuremathα emitters (LAEs) at z=6.5 in the Subaru Deep Field. Subsequent spectroscopy with Subaru and Keck identified eight more LAEs, giving a total of 17 spectroscopically confirmed LAEs at z=6.5. Based on this...

平成18年 9月   The Astrophysical Journal
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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.

Radiative transfer (RT) simulations are now at the forefront of numerical astrophysics. They are becoming crucial for an increasing number of astrophysical and cosmological problems; at the same time their computational cost has come within reach of ...

平成18年 9月   Monthly Notices of the Royal Astronomical Society
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Secondary Star Formation in a Population III Object

Susa, Hajime,   Umemura, Masayuki

We explore the possibility of subsequent star formation after a first star forms in a Population III object, by focusing on the radiation-hydrodynamic (RHD) feedback caused by ionizing photons, as well as H$_2$-dissociating photons. For this purpose,...

平成18年 7月   The Astrophysical Journal Letters