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The distance scale of cosmological gamma-ray bursts
Wei, DM; Lu, T
1997-07-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume323Issue:2Pages:312-316
AbstractThe 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.
KeywordCosmology, Theory Gamma Rays, Bursts
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordBATSE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:A1997XL46100003
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8409
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.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
Recommended Citation
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.
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