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

被引：89

作者：

Yamazaki, R ^{[1
]}

Ioka, K

Nakamura, T

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[2] Osaka Univ, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 607卷 / 02期

关键词：

gamma rays : bursts; gamma rays : theory;

D O I：

10.1086/421872

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Taking into account the recent suggestion that a short gamma-ray burst (GRB) looks like the first 1 s of a long GRB, we propose that the jet of a GRB consists of multiple subjets or subshells (i.e., an inhomogeneous jet model). The multiplicity of the subjets along a line of sight n(s) is an important parameter. If n(s) is large (much greater than1) the event looks like a long GRB, while if n(s) is small (similar to1) the event looks like a short GRB. If our line of sight is off-axis to any subjets, the event looks like an X-ray flash or an X-ray-rich GRB. The lognormal distribution of durations of short and long GRBs are also suggested in the same model.

引用

页码：L103 / L106

页数：4

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