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题名: GRB 060206: hints of precession of the central engine?
作者: Liu, X. W.1, 2, 3; Wu, X. F.1, 2, 3, 4; Lu Tan(陆埮)1, 2, 3
刊名: ASTRONOMY & ASTROPHYSICS
出版日期: 2008-08-01
卷号: 487, 期号:2, 页码:503-508
关键词: gamma rays : bursts ; gamma rays : theory ; gamma rays : observations
学科分类: Astronomy & Astrophysics
DOI: 10.1051/0004-6361:20078783
文章类型: Article
英文摘要: Aims. The high-redshift (z = 4.048) gamma-ray burst GRB 060206 showed unusual behavior, with a significant rebrightening by a factor of similar to 4 at about 3000 s after the burst. We argue that this rebrightening implies that the central engine became active again after the main burst produced by the first ejecta, then drove another more collimated jet-like ejecta with a larger viewing angle. The two ejecta both interacted with the ambient medium, giving rise to forward shocks that propagated into the ambient medium and reverse shocks that penetrated into the ejecta. The total emission was a combination of the emissions from the reverse- and forward-shocked regions. We discuss how this combined emission accounts for the observed rebrightening.
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 BURST ; LIGHT CURVES ; REVERSE SHOCK ; EARLY AFTERGLOWS ; PHYSICAL PARAMETERS ; WIND ENVIRONMENTS ; REFRESHED SHOCKS ; ACCRETION DISKS ; OPTICAL FLASHES ; DENSITY-JUMP
收录类别: SCI
语种: 英语
WOS记录号: WOS:000258327900017
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/11113
Appears in Collections:陆埮_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Nanjing Univ, Joint Ctr Particle Nucl Phys & Cosmol Purple Mt O, Nanjing 210008, Peoples R China
4.CALTECH, Pasadena, CA 91125 USA

Recommended Citation:
刘学文、吴雪峰、陆 埮.GRB 060206: hints of precession of the central engine?,A&A,2008,487(0):503-508
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