CONSTRAINTS ON THE BULK LORENTZ FACTORS OF GRB X-RAY FLARES
文献类型：期刊论文
| 作者 | Yi, Shuang-Xi1,2; Wu, Xue-Feng3,4,5 ; Wang, Fa-Yin1,2; Dai, Zi-Gao1,2
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2015-07-01 |
| 卷号 | 807期号:1页码:92 |
| 关键词 | gamma-ray burst: general radiation mechanisms: non-thermal |
| 英文摘要 | X-ray flares were discovered in the afterglow phase of gamma-ray bursts (GRBs) by the Swift satellite a decade ago and are known as a canonical component in GRB X-ray afterglows. In this paper, we constrain the Lorentz factors of GRB X-ray flares using two different methods. For the first method, we estimate the lower limit on the bulk Lorentz factor with the flare duration and jet break time. In the second method, the upper limit on the Lorentz factor is derived by assuming that the X-ray flare jet has undergone saturated acceleration. We also re-estimate the initial Lorentz factor with GRB afterglow onsets, and find the coefficient of the theoretical Lorentz factor is 1.67 rather than the commonly used 2 for the interstellar medium (ISM) and 1.44 for the wind case. We find that the correlation between the limited Lorentz factor and the isotropic radiation energy of X-ray flares in the ISM case is more consistent with that of prompt emission than the wind case in a statistical sense. For a comparison, the lower limit on the Lorentz factor is statistically larger than the extrapolation from prompt bursts in the wind case. Our results indicate that X-ray flares and prompt bursts are produced by the same physical mechanism. |
| 学科主题 | 天文和天体物理 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | LATE INTERNAL-SHOCK ; BURST AFTERGLOWS ; LIGHT CURVES ; SWIFT ; EMISSION ; MODEL ; ONSET ; JET ; DYNAMICS ; ORIGIN |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000358945200092 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/14880]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 4.Chinese Acad Sci, Chinese Ctr Antarctic Astron, Nanjing 210008, Jiangsu, Peoples R China 5.Chinese Acad Sci, Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yi, Shuang-Xi,Wu, Xue-Feng,Wang, Fa-Yin,et al. CONSTRAINTS ON THE BULK LORENTZ FACTORS OF GRB X-RAY FLARES[J]. ASTROPHYSICAL JOURNAL,2015,807(1):92. |
| APA | Yi, Shuang-Xi,Wu, Xue-Feng,Wang, Fa-Yin,&Dai, Zi-Gao.(2015).CONSTRAINTS ON THE BULK LORENTZ FACTORS OF GRB X-RAY FLARES.ASTROPHYSICAL JOURNAL,807(1),92. |
| MLA | Yi, Shuang-Xi,et al."CONSTRAINTS ON THE BULK LORENTZ FACTORS OF GRB X-RAY FLARES".ASTROPHYSICAL JOURNAL 807.1(2015):92. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
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。