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ID 14639
本文ファイル
著者
Inoue, Akio K.
Yamazaki, Ryo
Nakamura, Takashi
キーワード
cosmology
observations
gamma rays
bursts
intergalactic medium
radiative transfer
techniques
photometric
NDC
天文学・宇宙科学
抄録(英)
We discuss a way to study the cosmic reionization history using near-infrared (NIR) observations of the afterglows of high-redshift (5less than or similar tozless than or similar to25) gamma-ray bursts (GRBs) that will be detected by the Swift satellite. In principle, details of the cosmic reionization history should be imprinted in the NIR spectra of GRB afterglows. However, spectroscopy with a space telescope is required to obtain such information for very high redshifts (zgreater than or similar to15) unless the neutral fraction of the high-z universe is less than 10(-6). The broadband photometry has higher sensitivity than the spectroscopy, so that NIR photometric follow-up of GRB afterglows is very promising for examining cosmic reionization history. A few minutes exposure with a 8 m class ground-based telescope of the afterglows of the high-z GRBs will reveal how many times reionization occurred in the universe.
掲載誌名
Astrophysical Journal
601巻
2号
開始ページ
644
終了ページ
653
出版年月日
2004-02
出版者
University of Chicago Press
ISSN
0004-637X
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2004 The American Astronomical Society
部局名
理学研究科