Observations of GRBs at high redshift
Observations of GRBs at high redshift
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DOI：
10.1098/rsta.2006.1992
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发表时间：
2007-01
期刊：
影响因子：
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通讯作者：
N. Tanvir;P. Jakobsson
中科院分区：
文献类型：
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作者：
N. Tanvir;P. Jakobsson
伽马射线暴及其余辉的极端光度意味着原则上可以检测到非常高的红移。尽管由于当前样本的不完整性，伽马射线暴（GRB）的红移分布很难确定，但我们认为对于 Swift 检测到的爆发，中值红移在 2.5 到 3 之间，其中少数可能在 z>6 处。因此，伽马射线暴是再电离时代及其来源的潜在有力探测器。此外，它们似乎可以为宇宙的恒星形成历史提供限制，并且还可能有助于确定宇宙学参数。
The extreme luminosity of gamma-ray bursts and their afterglows means they are detectable, in principle, to very high redshifts. Although the redshift distribution of gamma-ray bursts (GRBs) is difficult to determine, due to incompleteness of present samples, we argue that for Swift-detected bursts, the median redshift is between 2.5 and 3, with a few per cent probably at z>6. Thus, GRBs are potentially powerful probes of the era of reionization and the sources responsible for it. Moreover, it seems probable that they can provide constraints on the star-formation history of the Universe and may also help in the determination of the cosmological parameters.