Test for cosmological time dilation in long gamma-ray bursts

	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
刊名	ASTROPHYSICAL JOURNAL
	1997
卷号	477 期号:2 页码:L69-L71
关键词	gamma rays bursts
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
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.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:A1997WM09100001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240289]
专题	高能物理研究所_院士高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
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,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.