Test for cosmological time dilation in long gamma-ray bursts | |
Che, H; Yang, Y; Wu, M; Li, TP | |
刊名 | ASTROPHYSICAL JOURNAL
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1997-03-10 | |
卷号 | 477期号:2页码:L69-L71 |
关键词 | gamma rays bursts |
ISSN号 | 0004-637X |
英文摘要 | 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. |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | UNIV CHICAGO PRESS |
WOS记录号 | WOS:A1997WM09100001 |
内容类型 | 期刊论文 |
源URL | [http://210.72.145.45/handle/361003/11515] ![]() |
专题 | 中国科学院国家授时中心 |
通讯作者 | Che, H |
作者单位 | 1.CHINESE ACAD SCI,SHAANXI ASTRON OBSERV,XIAN 710600,PEOPLES R CHINA 2.BEIJING NORMAL UNIV,DEPT ASTRON,BEIJING 100080,PEOPLES R CHINA |
推荐引用方式 GB/T 7714 | 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,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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