The distance scale of cosmological gamma-ray bursts

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	The distance scale of cosmological gamma-ray bursts
	Wei, DM; Lu, T
刊名	ASTRONOMY & ASTROPHYSICS
	1997-07-01
卷号	323 期号:2 页码:312-316
关键词	cosmology, theory gamma rays, bursts
ISSN号	0004-6361
英文摘要	The isotropic but radially non-uniform distribution of gamma-ray bursts (GRBs) observed with the Burst and Transient Source Experiment (BATSE) on board the Compton Gamma Ray Observatory (CGRO) suggests that the bursts may be at cosmological distances. At such distances, the expansion of the Universe should have two main effects on the statistics of gamma-ray bursts: first, it should stretch the temporal structure, resulting in dimmer bursts to be longer than bright bursts; second, it would decrease the number of gamma-ray bursts with distance, resulting in the value of [ V/V-max ] to be smaller than 0.5. Here we have used the observed time dilation (similar to 2) to estimate the distance of gamma-ray bursts, and then we use another method, calculating the value of [ V/V-max ] to obtain the distance of gamma-ray bursts. These two methods are independent and should be self-consistent. Our results show that the redshift of the dimmest bursts determined from these two distinct methods are consistent, z(dimmest) similar to 3.2, corresponding to a burst luminosity of L similar to 4 x 10(50)ergs(-1), which is different from the results reported previously.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	BATSE
收录类别	SCI
语种	英语
WOS记录号	WOS:A1997XL46100003
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8409]
专题	紫金山天文台_宇宙伽马暴、中子星及相关物理研究团组
作者单位	1.NANJING UNIV, DEPT ASTRON, NANJING 210093, PEOPLES R CHINA 2.ACAD SINICA, PURPLE MT OBSERV, NANJING 210008, PEOPLES R CHINA 3.CCAST, WORLD LAB, BEIJING 100080, PEOPLES R CHINA
推荐引用方式 GB/T 7714	Wei, DM,Lu, T. The distance scale of cosmological gamma-ray bursts[J]. ASTRONOMY & ASTROPHYSICS,1997,323(2):312-316.
APA	Wei, DM,&Lu, T.(1997).The distance scale of cosmological gamma-ray bursts.ASTRONOMY & ASTROPHYSICS,323(2),312-316.
MLA	Wei, DM,et al."The distance scale of cosmological gamma-ray bursts".ASTRONOMY & ASTROPHYSICS 323.2(1997):312-316.