YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
The long-lasting optical afterglow plateau of short burst GRB 130912A
Zhu, Biao1,2; Zhang, Fu-Wen1,3; Zhang, Shuai2,4; Jin, Zhi-Ping2; Wei, Da-Ming2
Source PublicationASTRONOMY & ASTROPHYSICS
2015-04
Volume576
DOI10.1051/0004-6361/201424993
Indexed BySCI ; EI
KeywordGamma Rays: General X-rays: Bursts
Abstract

Context. The short burst GRB 130912A was detected by Swift, Fermi satellites, and several ground-based optical telescopes. Its X-ray light curve decayed with time normally. The optical emission, however, displayed a long-term plateau. 

Aims. We examine the physical origin of the X-ray and optical emission of short GRB 130912A. 

Methods. The afterglow emission was analysed and the light curve fitted numerically. 

Results. The canonical forward-shock model of the afterglow emission accounts for the X-ray and optical data self-consistently, so the energy injection model that has been widely adopted to interpret the shallowly decaying afterglow emission is not needed. 

Conclusions. The burst was born in a very-low density interstellar medium, which is consistent with the compact-object merger model. Significant amounts of the energy of the forward shock were given to accelerate the non-thermal electrons and amplify the magnetic fields (i.e., epsilon(e) similar to 0.37 and epsilon(B) similar to 0.16, respectively), which are much more than those inferred in most short-burst afterglow modelling and can explain why the long-lasting optical afterglow plateau is rare in short GRBs.

Funding Project973 Program of China[2014CB845800] ; National Natural Science Foundation of China[11163003] ; National Natural Science Foundation of China[11273063] ; National Natural Science Foundation of China[11103084] ; National Natural Science Foundation of China[11303098] ; National Natural Science Foundation of China[U1331101] ; National Natural Science Foundation of China[11361140349] ; Chinese Academy of Sciences via Strategic Priority Research Programme[XDB09000000] ; Guangxi Natural Science Foundation[2013GXNSFAA019002] ; Open Research Programme of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201207] ; project of outstanding young teachers' training in higher education institutions of Guangxi
Funding Organization973 Program of China[2014CB845800] ; National Natural Science Foundation of China[11163003, 11273063, 11103084, 11303098, U1331101, 11361140349] ; Chinese Academy of Sciences via Strategic Priority Research Programme[XDB09000000] ; Guangxi Natural Science Foundation[2013GXNSFAA019002] ; Open Research Programme of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201207] ; project of outstanding young teachers' training in higher education institutions of Guangxi
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherEDP SCIENCES S A
Publication Place17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN0004-6361
URL查看原文
WOS IDWOS:000357274600006
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGAMMA-RAY BURST ; MAGNETAR CENTRAL ENGINE ; EARLY X-RAY ; LIGHT CURVES ; ENERGY INJECTION ; THEORETICAL IMPLICATIONS ; MILLISECOND MAGNETAR ; EXTENDED EMISSION ; HOST GALAXY ; SWIFT
EI Accession Number20151500728377
EI KeywordsGamma rays
EI Classification Number741.1Light/Optics - 932.1High Energy Physics
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9379
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorZhu, Biao
Affiliation1.College of Science, Guilin University of Technology, 541004 Guilin, PR China
2.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210008 Nanjing, PR China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, PR China
4.Graduate University of Chinese Academy of Sciences, 100049 Beijing, PR China
Recommended Citation
GB/T 7714
Zhu, Biao,Zhang, Fu-Wen,Zhang, Shuai,et al. The long-lasting optical afterglow plateau of short burst GRB 130912A[J]. ASTRONOMY & ASTROPHYSICS,2015,576.
APA Zhu, Biao,Zhang, Fu-Wen,Zhang, Shuai,Jin, Zhi-Ping,&Wei, Da-Ming.(2015).The long-lasting optical afterglow plateau of short burst GRB 130912A.ASTRONOMY & ASTROPHYSICS,576.
MLA Zhu, Biao,et al."The long-lasting optical afterglow plateau of short burst GRB 130912A".ASTRONOMY & ASTROPHYSICS 576(2015).
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