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Extragalactic scenarios for gamma‐ray bursts

 

作者: Bohdan Paczyn´ski,  

 

期刊: AIP Conference Proceedings  (AIP Available online 1991)
卷期: Volume 265, issue 1  

页码: 144-148

 

ISSN:0094-243X

 

年代: 1991

 

DOI:10.1063/1.42815

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The cosmological distance scale to gamma‐ray bursts is indicated by the observed distribution of the bursts in angle and intensity. The redshifts of the weakest and the strongest bursts detected by the BATSE experiment are estimated to bez≊1.5 andz≊0.2, respectively, while the strongest bursts detect by the PVO in its 11 years of operation were atz≊0.05. The bursts’ rate is ∼10−6per year in a galaxy like ours, and a typical energy release if ∼1051ergs, assuming isotropic emission. The rate of the neutron star and black hole collisions in close binaries is somewhat higher, and those collision release 1053–1054ergs in a burst like form, making them the primary candidates for the observed gamma‐ray events. Contrary to the common belief no observations available to date are in conflict with the cosmological distance to the bursters. A detection of gravitational lensing of some bursts, the redshift of the weakest events, and the absorption of soft x‐rays by the interstellar matter in the plane of our galaxy, are the specific predictions of the cosmological scenario.

 

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