A Unified Model of Short and Long Gamma-Ray Bursts, X-Ray Rich Gamma-Ray Bursts, and X-Ray Flashes

Details A Unified Model of Short and Long Gamma-Ray Bursts, X-Ray Rich Gamma-Ray Bursts, and X-Ray Flashes A Unified Model of Short and Long Gamma-Ray Bursts, X-Ray Rich Gamma-Ray Bursts, and X-Ray Flashes

2004-10-29

arxiv.org/abs/astro-ph/0410728v1

Nuovo Cim.C028:463-466,2005

Astronomy and Astrophysics

Astrophysics

6 pages, 1 figure, submitted to Adv.Sp.Res (proc. of the 35th COSPAR scientific assembly, Paris, 18-25 July 2004)

Scientific paper

10.1393/ncc/i2005-10084-6

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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