Evidence for spatial structure in the population of gamma‐ray bursts detected by the gamma‐ray spectrometer on the solar maximum mission
作者:
J. C. Higdon,
S. M. Matz,
G. H. Share,
D. C. Messina,
A. Iadicicco,
期刊:
AIP Conference Proceedings
(AIP Available online 1991)
卷期:
Volume 265,
issue 1
页码: 89-93
ISSN:0094-243X
年代: 1991
DOI:10.1063/1.42784
出版商: AIP
数据来源: AIP
摘要:
We applied theV/Vmaxtest to a sample of 132 candidate cosmic gamma‐ray bursts to determine quantitatively the spatial uniformity of the burst source population. We found (V/Vmax)=0.40±0.025, significantly different from 0.5, the value expected for a uniform distribution. The shape of ourV/Vmaxdistribution is approximately flat except for the lowest bin belowV/Vmaxof 0.05. We examined monoluminosity galactic disk and massive halo populations as possible sources for these candidate bursts. For these populations we found that, to reproduce ourV/Vmaxdistribution, burst sky locations should be highly anisotropic, concentrated towards the galactic plane with dipole moments ≊0.4 to 0.7.
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