A Shotgun Model for Gamma Ray Bursts

Details A Shotgun Model for Gamma Ray Bursts A Shotgun Model for Gamma Ray Bursts

1999-08-03

arxiv.org/abs/astro-ph/9908026v2

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, revised version accepted by ApJ Letters

Scientific paper

10.1086/312391

We propose that gamma ray bursts (GRBs) are produced by a shower of heavy blobs running into circumstellar material at highly relativistic speeds. The gamma ray emission is produced in the shocks these bullets drive into the surrounding medium. The short term variability seen in GRBs is set by the slowing-down time of the bullets while the overall duration of the burst is set by the lifetime of the central engine. A requirement of this model is that the ambient medium be dense, consistent with a strong stellar wind. The efficiency of the burst can be relatively high.

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