研究成果・発表論文

The Formation of Population III Binaries

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Saigo, Kazuya,   Matsumoto, Tomoaki,   Umemura, Masayuki

We explore the possibility for the formation of Population III binaries. The collapse of a rotating cylinder is simulated with a three- dimensional, high-resolution nested grid, assuming the thermal history of primordial gas. The simulations are done...

Gas stripping by radiation drag from an interstellar cloud

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Sato, Jun'ichi,   Umemura, Masayuki,   Sawada, Keisuke,   Matsuyama, Shingo

We perform two-dimensional hydrodynamic simulation of gas stripping by radiation drag from interstellar clouds moving in uniform radiation fields. To include relativistic radiation drag properly, the radiation hydrodynamic equation is solved taking i...

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

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Nagao, T.,   Taniguchi, Y.,   Kashikawa, N.,   Kodaira, K.,   Kaifu, N.,   Ando, H.

We report on the discovery of a star-forming galaxy at z=6.33 in the Subaru Deep Field. This object is selected as a candidate of an i$^′$-dropout high-redshift galaxy around z=6 because of its red i$^′$-z$^′$ color in our deep optical imaging survey...

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The Formation of Population III Binaries

Saigo, Kazuya,   Matsumoto, Tomoaki,   Umemura, Masayuki

We explore the possibility for the formation of Population III binaries. The collapse of a rotating cylinder is simulated with a three- dimensional, high-resolution nested grid, assuming the thermal history of primordial gas. The simulations are done...

平成16年 11月   The Astrophysical Journal Letters
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Gas stripping by radiation drag from an interstellar cloud

Sato, Jun'ichi,   Umemura, Masayuki,   Sawada, Keisuke,   Matsuyama, Shingo

We perform two-dimensional hydrodynamic simulation of gas stripping by radiation drag from interstellar clouds moving in uniform radiation fields. To include relativistic radiation drag properly, the radiation hydrodynamic equation is solved taking i...

平成16年 10月   Monthly Notices of the Royal Astronomical Society
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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.

We report on the discovery of a star-forming galaxy at z=6.33 in the Subaru Deep Field. This object is selected as a candidate of an i$^′$-dropout high-redshift galaxy around z=6 because of its red i$^′$-z$^′$ color in our deep optical imaging survey...

平成16年 9月   The Astrophysical Journal Letters
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The Effects of Early Cosmic Reionization on the Substructure Problem in Galactic Halos

Susa, Hajime,   Umemura, Masayuki

Recent observations of the cosmic microwave background by the Wilkinson Microwave Anisotropy Probe strongly suggest that the reionization of the universe took place quite early (zåisebox-0.5ex~17). On the other hand, it has been pointed out that the ...

平成16年 7月   The Astrophysical Journal Letters