PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组
The optical flare and afterglow light curve of GRB 050904 at redshift z=6.29
Wei, DM; Yan, T; Fan, YZ
2006-01-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume636Issue:2Pages:L69-L72
AbstractGRB 050904 is very interesting, since it is by far the most distant gamma-ray burst event known to date (z = 6.29). It was reported that during the prompt high-energy emission phase, a very bright optical flare was detected that was temporally coincident with an X-ray flare. Here we use two models to explain the optical flare. One is the "late internal shock model," in which the optical flare is produced by the synchrotron radiation of the electrons accelerated by the late internal shock and the X-ray flare is produced by the synchrotron self-Compton mechanism. The other is the external forward-reverse shock model, in which the optical flare is from the reverse-shock emission and the X-ray flare is attributed to the activity of the central engine. We show that with the proper parameters, a bright optical flare can appear in either model. We think that the late internal shock model is more favored, since in this model the optical flash and the X-ray flare have the same origin, which provides a natural explanation of their temporal coincidence. In the forward-reverse shock scenario, fits to the optical flare and the late afterglow suggest that the physical parameters of the reverse shock are much different from those of the forward shock, as found in previous modeling of the optical flash of GRB 990123.
KeywordGamma Rays : Bursts Ism : Jets And Outflows Radiation Mechanisms : Nonthermal
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordGAMMA-RAY-BURST ; REVERSE-SHOCK ; PHYSICAL PARAMETERS ; ENERGY INJECTION ; EMISSION ; MODEL ; GRB-990123 ; FLASH ; GRB-021211 ; ENGINE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000234469700003
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/3614
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Wei, DM,Yan, T,Fan, YZ. The optical flare and afterglow light curve of GRB 050904 at redshift z=6.29[J]. ASTROPHYSICAL JOURNAL,2006,636(2):L69-L72.
APA Wei, DM,Yan, T,&Fan, YZ.(2006).The optical flare and afterglow light curve of GRB 050904 at redshift z=6.29.ASTROPHYSICAL JOURNAL,636(2),L69-L72.
MLA Wei, DM,et al."The optical flare and afterglow light curve of GRB 050904 at redshift z=6.29".ASTROPHYSICAL JOURNAL 636.2(2006):L69-L72.
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