Near-Infrared Colors of Gamma-Ray Burst Afterglows and Cosmic Reionization History
Astrophysical Journal Volume 601 Issue 2
Page 644-653
published_at 2004-02
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| File | |
| Title ( eng ) |
Near-Infrared Colors of Gamma-Ray Burst Afterglows and Cosmic Reionization History
|
| Creator |
Inoue Akio K.
Yamazaki Ryo
Nakamura Takashi
|
| Source Title |
Astrophysical Journal
|
| Volume | 601 |
| Issue | 2 |
| Start Page | 644 |
| End Page | 653 |
| Abstract |
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.
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| Keywords |
cosmology
observations
gamma rays
bursts
intergalactic medium
radiative transfer
techniques
photometric
|
| NDC |
Astronomy. Space sciences [ 440 ]
|
| Language |
eng
|
| Resource Type | journal article |
| Publisher |
University of Chicago Press
|
| Date of Issued | 2004-02 |
| Rights |
Copyright (c) 2004 The American Astronomical Society
|
| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0004-637X
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