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题名: High-energy component of GRB 941017 revisited and the reverse-shock synchrotron self-Compton emission
作者: Wang, XY; Cheng, KS; Dai, ZG; Lu Tan(陆埮)
刊名: ASTRONOMY & ASTROPHYSICS
出版日期: 2005-09-01
卷号: 439, 期号:3, 页码:957-961
关键词: gamma rays : bursts ; radiation mechanisms : non-thermal
学科分类: Astronomy & Astrophysics
DOI: 10.1051/0004-6361.20052984
文章类型: Article
英文摘要: The different temporal behaviors of the high energy component and the hundreds of keV emission from GRB 941017 suggest that they come from different emission regions. The nearly constant flux of this high energy component is consistent with being produced in the region of the early external shock formed when the ejecta hit the surrounding medium. Here we show that the relatively hard spectrum of this component can be numerically modelled as the synchrotron self-Compton emission from external reverse shock when the ejecta is decelerated by a typical interstellar medium. Constraints on the parameters of the fireball, such as the initial Lorentz factor., the burst energy, and the magnetic field equipartition fraction are obtained. Very high initial Lorentz factor (n greater than or similar to 10(3)) inferred for this burst may explain the rarity of this kind of high-energy component in gamma-ray bursts (GRBs). Large GeV - TeV flux from the reverse shock is predicted for GRBs with high initial Lorentz factors.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: GAMMA-RAY BURSTS ; EARLY AFTERGLOW EMISSION ; EARLY OPTICAL-EMISSION ; BACKGROUND-RADIATION ; SPECTRAL COMPONENT ; COSMIC-RAYS ; MODEL ; PREDICTIONS ; GRB-021211 ; PHOTONS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000231206900014
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/10953
Appears in Collections:陆埮_期刊论文

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作者单位: 1.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
2.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
3.Chinese Acad Sci, Purple Mtn Observ, Nanjing 210008, Peoples R China

Recommended Citation:
王祥玉、郑广生、戴子高、陆 埮.High-energy component of GRB 941017 revisited and the reverse-shock synchrotron self-Compton emission,A&A,2005,439(957):
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文件名: 074-2005-AA-WaChDL-High-energy component of GRB 941017 revisited and the reverse-shock synchrotron self-Compton emission-439#-957-961-aa2984-05.pdf
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