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题名: TIME EVOLUTION OF FLARES IN GRB 130925A: JET PRECESSION IN A BLACK HOLE ACCRETION SYSTEM
作者: Hou, SJ ;  Liu, T ;  Gu, WM ;  Lin, DB ;  Sun, MY ;  Wu, XF ;  Lu, JF
刊名: ASTROPHYSICAL JOURNAL LETTERS
出版日期: 2014
卷号: 781, 期号:1
关键词: GAMMA-RAY BURSTS ;  CENTRAL ENGINE ;  1ST SURVEY ;  DISKS ;  SWIFT ;  LONG
学科分类: Physics
DOI: 10.1088/2041-8205/781/1/L19
通讯作者: Liu, T (reprint author), Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China.
部门归属: [Hou, Shu-Jin; Liu, Tong; Gu, Wei-Min; Sun, Mou-Yuan; Lu, Ju-Fu] Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China; [Hou, Shu-Jin; Liu, Tong; Gu, Wei-Min; Sun, Mou-Yuan; Lu, Ju-Fu] Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Fujian, Peoples R China; [Hou, Shu-Jin; Wu, Xue-Feng] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China; [Liu, Tong] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Lin, Da-Bin] Guangxi Univ, Dept Phys, Nanning 530004, Guangxi, Peoples R China; [Lin, Da-Bin] Guangxi Univ, GXU NAOC Ctr Astrophys & Space Sci, Nanning 530004, Guangxi, Peoples R China; [Sun, Mou-Yuan] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA; [Sun, Mou-Yuan] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA
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.
资助者: 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]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000329582400019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15508
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
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).
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