PMO OpenIR  > 南极天文中心
CONSTRAINTS ON THE BULK LORENTZ FACTORS OF GRB X-RAY FLARES
Yi, Shuang-Xi1,2; Wu, Xue-Feng3,4,5; Wang, Fa-Yin1,2; Dai, Zi-Gao1,2
2015-07-01
Source PublicationASTROPHYSICAL JOURNAL
Volume807Issue:1Pages:92
AbstractX-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.
KeywordGamma-ray Burst: General Radiation Mechanisms: Non-thermal
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/807/1/92
WOS KeywordLATE INTERNAL-SHOCK ; BURST AFTERGLOWS ; LIGHT CURVES ; SWIFT ; EMISSION ; MODEL ; ONSET ; JET ; DYNAMICS ; ORIGIN
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000358945200092
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14880
Collection南极天文中心
Affiliation1.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
Recommended Citation
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.
Files in This Item:
File Name/Size DocType Version Access License
2015042.pdf(483KB) 开放获取Apache LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yi, Shuang-Xi]'s Articles
[Wu, Xue-Feng]'s Articles
[Wang, Fa-Yin]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yi, Shuang-Xi]'s Articles
[Wu, Xue-Feng]'s Articles
[Wang, Fa-Yin]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yi, Shuang-Xi]'s Articles
[Wu, Xue-Feng]'s Articles
[Wang, Fa-Yin]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2015042.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.