The optical flare and afterglow light curve of GRB 050904 at redshift z=6.29 | |
Wei, DM![]() ![]() | |
刊名 | ASTROPHYSICAL JOURNAL
![]() |
2006-01-10 | |
卷号 | 636期号:2页码:L69-L72 |
关键词 | gamma rays : bursts ISM : jets and outflows radiation mechanisms : nonthermal |
ISSN号 | 0004-637X |
英文摘要 | GRB 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. |
学科主题 | Astronomy & Astrophysics |
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 ; REVERSE-SHOCK ; PHYSICAL PARAMETERS ; ENERGY INJECTION ; EMISSION ; MODEL ; GRB-990123 ; FLASH ; GRB-021211 ; ENGINE |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000234469700003 |
公开日期 | 2012-02-07 |
内容类型 | 期刊论文 |
源URL | [http://159.226.72.40/handle/332002/3614] ![]() |
专题 | 紫金山天文台_宇宙伽马暴、中子星及相关物理研究团组 |
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 |
推荐引用方式 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. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论