INTERNAL ENERGY DISSIPATION OF GAMMA-RAY BURSTS OBSERVED WITH SWIFT: PRECURSORS, PROMPT GAMMA-RAYS, EXTENDED EMISSION, AND LATE X-RAY FLARES
Hu, You-Dong1,2; Liang, En-Wei1,2,3; Xi, Shao-Qiang1,2; Peng, Fang-Kun1,2; Lu, Rui-Jing1,2; Lu, Lian-Zhong1,2; Zhang, Bing; Hu, YD (reprint author), Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-07-10
卷号789期号:2
DOI10.1088/0004-637X/789/2/145
收录类别SCI
关键词Gamma-ray Burst: General Methods: Statistical
摘要We jointly analyze the gamma-ray burst (GRB) data observed with Burst Alert Telescope (BAT) and X-ray Telescope on board the Swift mission to present a global view on the internal energy dissipation processes in GRBs, including precursors, prompt gamma-ray emission, extended soft gamma-ray emission, and late X-ray flares. The Bayesian block method is utilized to analyze the BAT light curves to identify various emission episodes. Our results suggest that these emission components likely share the same physical origin, which is the repeated activation of the GRB central engine. What we observe in the gamma-ray band may be a small part of more extended underlying activities. The precursor emission, which is detected in about 10% of Swift GRBs, is preferably detected in those GRBs that have a massive star core-collapse origin. The soft extended emission tail, on the other hand, is preferably detected in those GRBs that have a compact star merger origin. Bright X-ray emission is detected during the BAT quiescent phases prior to subsequent gamma-ray peaks, implying that X-ray emission may be detectable prior the BAT trigger time. Future GRB alert instruments with soft X-ray capability are essential for revealing the early stages of GRB central engine activities, and shedding light on jet composition and the jet launching mechanism in GRBs.
项目资助者National Basic Research Program (973 Program) of China(2014CB845800) ; National Natural Science Foundation of China(11025313,11163001,11363002) ; Guangxi Science Foundation(2013GXNSFFA019001) ; Key Laboratory for the Structure and Evolution of Celestial Objects of Chinese Academy of Sciences ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000338674900054
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]COOLED ACCRETION DISKS ; CENTRAL ENGINE ACTIVITY ; 25 APRIL 1998 ; COMPREHENSIVE ANALYSIS ; PHYSICAL ORIGINS ; LIGHT CURVES ; BLACK-HOLES ; HOST GALAXY ; SHOCK MODEL ; SPECTRAL PROPERTIES
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9437
专题中国科学院天体结构与演化重点实验室
通讯作者Hu, YD (reprint author), Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China.
作者单位1.Department of Physics and GXU-NAOC Center for Astrophysics and Space Sciences, Guangxi University, Nanning 530004, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kuming 650011, China
3.Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154, USA
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Hu, You-Dong,Liang, En-Wei,Xi, Shao-Qiang,et al. INTERNAL ENERGY DISSIPATION OF GAMMA-RAY BURSTS OBSERVED WITH SWIFT: PRECURSORS, PROMPT GAMMA-RAYS, EXTENDED EMISSION, AND LATE X-RAY FLARES[J]. ASTROPHYSICAL JOURNAL,2014,789(2).
APA Hu, You-Dong.,Liang, En-Wei.,Xi, Shao-Qiang.,Peng, Fang-Kun.,Lu, Rui-Jing.,...&Hu, YD .(2014).INTERNAL ENERGY DISSIPATION OF GAMMA-RAY BURSTS OBSERVED WITH SWIFT: PRECURSORS, PROMPT GAMMA-RAYS, EXTENDED EMISSION, AND LATE X-RAY FLARES.ASTROPHYSICAL JOURNAL,789(2).
MLA Hu, You-Dong,et al."INTERNAL ENERGY DISSIPATION OF GAMMA-RAY BURSTS OBSERVED WITH SWIFT: PRECURSORS, PROMPT GAMMA-RAYS, EXTENDED EMISSION, AND LATE X-RAY FLARES".ASTROPHYSICAL JOURNAL 789.2(2014).
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