FAILED GAMMA-RAY BURSTS: THERMAL ULTRAVIOLET/SOFT X-RAY EMISSION ACCOMPANIED BY PECULIAR AFTERGLOWS

被引：9
作者：
Xu, M. [1 ,2 ,3 ]
Nagataki, S. [2 ]
Huang, Y. F. [1 ]
Lee, S. -H. [2 ]
机构：
[1] Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
[2] Yukawa Inst Theoret Phys, Sakyo Ku, Kyoto 6068502, Japan
[3] Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2012年 / 746卷 / 01期
基金：
日本学术振兴会; 中国国家自然科学基金;
关键词：
gamma-ray burst: general; radiation mechanisms: thermal; PROMPT EMISSION; PHOTOSPHERIC EMISSION; SHOCK MODEL; JET; COMPONENT; SPECTRA; GRB; EFFICIENCY;
D O I：
10.1088/0004-637X/746/1/49
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that the photospheres of "failed" gamma-ray bursts (GRBs), whose bulk Lorentz factors are much lower than 100, can be outside of internal shocks. The resulting radiation from the photospheres is thermal and bright in the UV/soft X-ray band. The photospheric emission lasts for about 1000 s with a luminosity about several times 10(46) erg s(-1). These events can be observed by current and future satellites. It is also shown that the afterglows of failed GRBs are peculiar at the early stage, which makes it possible to distinguish failed GRBs from ordinary GRBs and beaming-induced orphan afterglows.
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页数：6
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