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A unified model of short and long gamma-ray bursts, X-ray rich gamma-ray bursts, and X-ray flashes

Authors
Journal
Advances in Space Research
0273-1177
Publisher
Elsevier
Publication Date
Volume
38
Issue
7
Identifiers
DOI: 10.1016/j.asr.2005.06.006
Keywords
  • Gamma-Ray Bursts
  • Gamma Rays: Theory

Abstract

Abstract We propose a possible unified model of short and long gamma-ray bursts (GRBs), X-ray rich GRBs, and X-ray flashes. The jet of a GRB is assumed to consist of multiple sub-jets or sub-shells (i.e., an inhomogeneous jet model). The multiplicity of the sub-jets along a line of sight n s is an important parameter. If n s is large (≫1) the event looks like a long GRB, while if n s = 1, the event looks like a short GRB. Finally, when n s = 0, the event looks like an X-ray flash or an X-ray rich GRB. Furthermore, our model may also explain the bimodal distributions of T 90 duration of BATSE-GRBs.

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