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Test for cosmological time dilation in long gamma-ray bursts
Che, H; Yang, Y; Wu M(吴枚); Li TB(李惕碚); Wu, M; Li, TP
1997
发表期刊ASTROPHYSICAL JOURNAL
卷号477期号:2页码:L69-L71
通讯作者CHINESE ACAD SCI,SHAANXI ASTRON OBSERV,XIAN 710600,PEOPLES R CHINA ; BEIJING NORMAL UNIV,DEPT ASTRON,BEIJING 100080,PEOPLES R CHINA
文章类型Article
摘要We present a test to investigate cosmological time dilation in long gamma-ray bursts (t(90) > 1.5 s) using V, the ratio of expected peak counts in 64 and in 1024 ms. The theoretical evolution of V with redshift shows that dimmer bursts have flatter peaks than brighter ones when we assume that (1) the bursters are at cosmological distances, (2) the bursts have standard exponential profiles, and (3) the burst peak duration follows a power law in narrowing with cosmological redshift energy. The calculated V-distribution of long bursts versus intensity in a Friedmann universe with Omega = 1 and Lambda = 0 is consistent with that found from previous results for long bursts. The estimated redshift is z similar to 2, and the time dilation factor with energy correction is similar to 1.8.
关键词gamma rays bursts
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/310531
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:A1997WM09100001
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被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240289
专题院士
作者单位中国科学院高能物理研究所
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Che, H,Yang, Y,Wu M,et al. Test for cosmological time dilation in long gamma-ray bursts[J]. ASTROPHYSICAL JOURNAL,1997,477(2):L69-L71.
APA Che, H,Yang, Y,吴枚,李惕碚,Wu, M,&Li, TP.(1997).Test for cosmological time dilation in long gamma-ray bursts.ASTROPHYSICAL JOURNAL,477(2),L69-L71.
MLA Che, H,et al."Test for cosmological time dilation in long gamma-ray bursts".ASTROPHYSICAL JOURNAL 477.2(1997):L69-L71.
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