研究成果・発表論文

A Search for Ly\ensuremathα Emitters at Redshift 3.7

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Fujita, Shinobu S.,   Ajiki, Masaru,   Shioya, Yasuhiro,   Nagao, Tohru,   Murayama, Takashi,   Taniguchi, Yoshiaki

We present the results of a survey for emission-line objects, based on optical intermediate-band (\ensuremathłambda$_c$=5736 ̊A and \ensuremathΔ\ensuremathłambda=280 \Å) and broadband (B, V, R, and i') observations of the Subaru/XMM-Newton Deep Field...

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A Spectrophotometric Method to Determine the Inclination of Class I Objects

Nakazato, Takeshi,   Nakamoto, Taishi,   Umemura, Masayuki

A new method that enables us to estimate the inclination of Class I young stellar objects is proposed. Since Class I objects are not spherically symmetric, it is likely that the observed feature is sensitive to the inclination of the system. Thus, we...

平成15年 1月   The Astrophysical Journal
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Protoquasars: Physical States and Observable Properties

Kawakatu, Nozomu,   Umemura, Masayuki,   Mori, Masao

Based on the radiation hydrodynamic model for black hole (BH) growth and incorporating the chemical evolution of the early-type host galaxy, we construct the coevolution model of the quasar (QSO) BH and host galaxy. As a result, it is found that afte...

平成15年 1月   The Astrophysical Journal
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A Search for Ly\ensuremathα Emitters at Redshift 3.7

Fujita, Shinobu S.,   Ajiki, Masaru,   Shioya, Yasuhiro,   Nagao, Tohru,   Murayama, Takashi,   Taniguchi, Yoshiaki

We present the results of a survey for emission-line objects, based on optical intermediate-band (\ensuremathłambda$_c$=5736 ̊A and \ensuremathΔ\ensuremathłambda=280 \Å) and broadband (B, V, R, and i') observations of the Subaru/XMM-Newton Deep Field...

平成15年 1月   The Astronomical Journal
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Does the Slim-Disk Model Correctly Consider Photon-trapping Effects?

Ohsuga, Ken,   Mineshige, Shin,   Mori, Masao,   Umemura, Masayuki

We investigate the photon-trapping effects in the supercritical black hole accretion flows by solving radiation transfer as well as the energy equations of radiation and gas. It is found that the slim-disk model generally overestimates the luminosity...

平成14年 7月   The Astrophysical Journal
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The Stellar Initial Mass Function in Primordial Galaxies

Nakamura, Fumitaka,   Umemura, Masayuki

In the context of star formation through fragmentation of an extremely metal deficient protogalactic cloud, the gravitational collapse of filamentary gas clouds is explored with one-dimensional numerical hydrodynamics coupled with nonequilibrium chem...

平成14年 4月   The Astrophysical Journal