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	Modeling the multiband afterglows of grb 060614 and grb 060908: further evidence for a double power-law hard electron energy spectrum
	Zhang,Q.; Xiong,S. L.; Song,L. M.
刊名	The astrophysical journal
	2018-04-25
卷号	857期号:2
关键词	Acceleration of particles Gamma-ray burst: individual (grb 060614, grb 060908) Radiation mechanisms: non-thermal
ISSN号	0004-637X
DOI	10.3847/1538-4357/aab897
英文摘要	Abstract electrons accelerated in relativistic collisionless shocks are usually assumed to follow a power-law energy distribution with an index of p. observationally, although most gamma-ray bursts (grbs) have afterglows that are consistent with p?>?2, there are still a few grbs suggestive of a hard (p??2 and an “injection break” assumed as γb?∝?γq in the highly relativistic regime, where γ is the bulk lorentz factor of the jet. in this paper, we show that grb?060614 and grb?060908 provide further evidence for such a dplh spectrum. we interpret the multiband afterglow of grb?060614 with the dplh model in a homogeneous interstellar medium by taking into account a continuous energy injection process, while, for grb?060908, a wind-like circumburst density profile is used. the two bursts, along with grb?091127, suggest a similar behavior in the evolution of the injection break, with q?～?0.5. whether this represents a universal law of the injection break remains uncertain and more afterglow observations such as these are needed to test this conjecture.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-857-2-AAB897
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2175745
专题	高能物理研究所
作者单位	Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China zhangqiang@ihep.ac.cn
推荐引用方式 GB/T 7714	Zhang,Q.,Xiong,S. L.,Song,L. M.. Modeling the multiband afterglows of grb 060614 and grb 060908: further evidence for a double power-law hard electron energy spectrum[J]. The astrophysical journal,2018,857(2).
APA	Zhang,Q.,Xiong,S. L.,&Song,L. M..(2018).Modeling the multiband afterglows of grb 060614 and grb 060908: further evidence for a double power-law hard electron energy spectrum.The astrophysical journal,857(2).
MLA	Zhang,Q.,et al."Modeling the multiband afterglows of grb 060614 and grb 060908: further evidence for a double power-law hard electron energy spectrum".The astrophysical journal 857.2(2018).

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