GRB 990123: Evidence that the gamma rays come from a central engine
Fenimore, EE; Ramirez-Ruiz, E; Wu BB(吴伯冰); Wu, BB
刊名ASTROPHYSICAL JOURNAL
1999
卷号518期号:2页码:L73-L76
关键词gamma rays : bursts
学科分类Astronomy & Astrophysics
DOI10.1086/312075
通讯作者Los Alamos Natl Lab, Los Alamos, NM 87545 USA ; Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, DF, Mexico ; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
文章类型Article
英文摘要GRB 990123 was a long, complex gamma-ray burst with an optical transient that started early within the gamma-ray phase. The peak and power-law decay of the early optical emission strongly indicate the presence of a decelerating relativistic shell during that phase. Prior to this burst, it was not known if the shell decelerated during the burst, so an external shock origin for the gamma rays was still possible. If the gamma rays are produced in the external shock, then the pulse widths should reflect the observed deceleration of the shell and increase by a factor between 1.25 and 2.3, depending on the angular extent of the shell. We analyze the fine time structure observed in the gamma-ray data from BATSE and determine that the width of the peaks does not increase as expected for a decelerating shell; the later pulses are only 1.034 +/- 0.035 longer than the earlier pulses. The lack of pulse width evolution eliminates the only remaining kinematically acceptable external shock explanation for the gamma-ray phase and, thus, the gamma rays must originate at a central engine.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000081163800004
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被引频次:37[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240296
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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Fenimore, EE,Ramirez-Ruiz, E,Wu BB,et al. GRB 990123: Evidence that the gamma rays come from a central engine[J]. ASTROPHYSICAL JOURNAL,1999,518(2):L73-L76.
APA Fenimore, EE,Ramirez-Ruiz, E,吴伯冰,&Wu, BB.(1999).GRB 990123: Evidence that the gamma rays come from a central engine.ASTROPHYSICAL JOURNAL,518(2),L73-L76.
MLA Fenimore, EE,et al."GRB 990123: Evidence that the gamma rays come from a central engine".ASTROPHYSICAL JOURNAL 518.2(1999):L73-L76.
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