PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组
A COMPREHENSIVE STUDY OF GAMMA-RAY BURST OPTICAL EMISSION. II. AFTERGLOW ONSET AND LATE RE-BRIGHTENING COMPONENTS
Liang, En-Wei1,2,3,4; Li, Liang1,2; Gao, He4; Zhang, Bing4; Liang, Yun-Feng1,2; Wu, Xue-Feng5; Yi, Shuang-Xi6; Dai, Zi-Gao6; Tang, Qing-Wen1,2; Chen, Jie-Min1,2; Lu, Hou-Jun4; Zhang, Jin3,7; Lu, Rui-Jing1,2; Lu, Lian-Zhong1,2; Wei, Jian-Yan3
2013-09-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume774Issue:1Pages:0
Corresponding AuthorLiang, EW (reprint author), Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China. Email: lew@gxu.edu.cn ; zhang@physics.unlv.edu
AbstractWe continue our systematic statistical study of various components of gamma-ray burst (GRB) optical light curves. We decompose the early onset bump and the late re-brightening bump with empirical fits and analyze their statistical properties. Among the 146 GRBs that have well-sampled optical light curves, the onset and re-brightening bumps are observed in 38 and 26 GRBs, respectively. It is found that the typical rising and decaying slopes for both the onset and re-brightening bumps are similar to 1.5 and similar to-1.15, respectively. No early onset bumps in the X-ray band are detected to be associated with the optical onset bumps, while an X-ray re-brightening bump is detected for half of the re-brightening optical bumps. The peak luminosity is anti-correlated with the peak time L-p proportional to t(p)(-1.81 +/- 0.32) for the onset bumps and L-p proportional to t(p)(-0.83 +/- 0.17) for the re-brightening bumps. Both L-p and the isotropic energy release of the onset bumps are correlated with E-gamma,E- iso, whereas no similar correlation is found for the re-brightening bumps. These results suggest that the afterglow onset bumps are likely due to the deceleration of the GRB fireballs. Taking the onset bumps as probes for the properties of the fireballs and their ambient medium, we find that the typical power-law index of the relativistic electrons is 2.5 and the medium density profile behaves as n proportional to r(-1) within the framework of the synchrotron external shock models. With the medium density profile obtained from our analysis, we also confirm the correlation between the initial Lorentz factor (Gamma(0)) and E-iso,E-gamma in our previous work. The jet component that produces the re-brightening bump seems to be on-axis and independent of the prompt emission jet component. Its typical kinetic energy budget would be about one order of magnitude larger than the prompt emission component, but with a lower Gamma(0), typically several tens.
KeywordGamma-ray Burst: General Radiation Mechanisms: Non-thermal
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/774/1/13
WOS KeywordINITIAL LORENTZ FACTOR ; SWIFT GRB AFTERGLOWS ; HIGH-ENERGY EMISSION ; DENSITY-JUMP MEDIUM ; X-RAY ; LIGHT CURVES ; PROMPT EMISSION ; MILLISECOND PULSARS ; CENTRAL ENGINE ; OFF-AXIS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000323426700013
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9888
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Guangxi Univ, Dept Phys, Nanning 530004, Peoples R China
2.Guangxi Univ, GXU NAOC Ctr Astrophys & Space Sci, Nanning 530004, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA
5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
6.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China
7.Guangxi Teachers Educ Univ, Coll Phys & Elect Engn, Nanning 530001, Peoples R China
Recommended Citation
GB/T 7714
Liang, En-Wei,Li, Liang,Gao, He,et al. A COMPREHENSIVE STUDY OF GAMMA-RAY BURST OPTICAL EMISSION. II. AFTERGLOW ONSET AND LATE RE-BRIGHTENING COMPONENTS[J]. ASTROPHYSICAL JOURNAL,2013,774(1):0.
APA Liang, En-Wei.,Li, Liang.,Gao, He.,Zhang, Bing.,Liang, Yun-Feng.,...&Wei, Jian-Yan.(2013).A COMPREHENSIVE STUDY OF GAMMA-RAY BURST OPTICAL EMISSION. II. AFTERGLOW ONSET AND LATE RE-BRIGHTENING COMPONENTS.ASTROPHYSICAL JOURNAL,774(1),0.
MLA Liang, En-Wei,et al."A COMPREHENSIVE STUDY OF GAMMA-RAY BURST OPTICAL EMISSION. II. AFTERGLOW ONSET AND LATE RE-BRIGHTENING COMPONENTS".ASTROPHYSICAL JOURNAL 774.1(2013):0.
Files in This Item:
File Name/Size DocType Version Access License
2013199A COMPREHENSI(1641KB) 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liang, En-Wei]'s Articles
[Li, Liang]'s Articles
[Gao, He]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liang, En-Wei]'s Articles
[Li, Liang]'s Articles
[Gao, He]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liang, En-Wei]'s Articles
[Li, Liang]'s Articles
[Gao, He]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2013199A COMPREHENSIVE STUDY OF GAMMA-RAY BURST OPTICAL EMISSION. II. AFTERGLOW ONSET AND LATE RE-BRIGHTENING COMPONENTS.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

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