TIME EVOLUTION OF FLARES IN GRB 130925A: JET PRECESSION IN A BLACK HOLE ACCRETION SYSTEM

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	TIME EVOLUTION OF FLARES IN GRB 130925A: JET PRECESSION IN A BLACK HOLE ACCRETION SYSTEM
	Hou, SJ ; Liu, T ; Gu, WM ; Lin, DB ; Sun, MY ; Wu, XF ; Lu, JF
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2014
卷号	781 期号:1
关键词	GAMMA-RAY BURSTS CENTRAL ENGINE 1ST SURVEY DISKS SWIFT LONG
ISSN号	2041-8205
通讯作者	Liu, T (reprint author), Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China.
英文摘要	GRB 130925A, composed of three gamma-ray emission episodes and a series of orderly flares, has been detected by Swift, Fermi, Konus-Wind, and INTEGRAL. If the third weakest gamma-ray episode can be considered a giant flare, we find that after the second gamma-ray episode observed by INTEGRAL located at about 2000 s, a positive relation exists between the time intervals of the adjacent flares and the time since the episode. We suggest that the second gamma-ray episode and its flares originate from the resumption of the accretion process due to the fragments from the collapsar falling back; such a relation may be related to a hyperaccretion disk around a precessed black hole (BH). We propose that the origin and time evolution of the flares, and the approximately symmetrical temporal structure and spectral evolution of the single flare can be explained well by a jet precession model. In addition, the mass and spin of the BH can be constrained, which indicates a stellar-mass, fast-rotating BH located in the center of GRB 130925A.
学科主题	Physics
收录类别	SCI
资助信息	National Basic Research Program of China (973 Program) [2013CB834900, 2014CB845800]; National Natural Science Foundation of China [11103015, 11222328, 11233006, 11322328, 11333004, U1331101]; One-Hundred-Talents Program; Youth Innovation Promotion Association of Chinese Academy of Sciences; China Scholarship Council [[2013] 3009]
原文出处	http://dx.doi.org/10.1088/2041-8205/781/1/L19
语种	英语
WOS记录号	WOS:000329582400019
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15508]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Hou, SJ,Liu, T,Gu, WM,et al. TIME EVOLUTION OF FLARES IN GRB 130925A: JET PRECESSION IN A BLACK HOLE ACCRETION SYSTEM[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,781(1).
APA	Hou, SJ.,Liu, T.,Gu, WM.,Lin, DB.,Sun, MY.,...&Lu, JF.(2014).TIME EVOLUTION OF FLARES IN GRB 130925A: JET PRECESSION IN A BLACK HOLE ACCRETION SYSTEM.ASTROPHYSICAL JOURNAL LETTERS,781(1).
MLA	Hou, SJ,et al."TIME EVOLUTION OF FLARES IN GRB 130925A: JET PRECESSION IN A BLACK HOLE ACCRETION SYSTEM".ASTROPHYSICAL JOURNAL LETTERS 781.1(2014).