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On the magnetization of gamma-ray burst blast waves
Lemoine, Martin1; Li, Zhuo2,3; Wang, Xiang-Yu4,5
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2013-11
Volume435Issue:4Pages:3009-3016
DOI10.1093/mnras/stt1494
Indexed BySCI
KeywordAcceleration Of Particles Shock Waves Gamma-ray Burst: General
Abstract

The origin of magnetic fields that permeate the blast waves of gamma-ray bursts (GRBs) is a long-standing problem. The present paper argues that in four GRBs revealing extended emission at > 100 MeV, with follow-up in the radio, optical and X-ray domains at later times, this magnetization can be described as the partial decay of the micro-turbulence that is generated in the shock precursor. Assuming that the bulk of the extended emission > 100 MeV can be interpreted as synchrotron emission of shock-accelerated electrons, we model the multi-wavelength light curves of GRB 090902B, GRB 090323, GRB 090328 and GRB 110731A, using a simplified then a full synchrotron calculation with power-law-decaying micro-turbulence epsilon(B) t(t)(alpha) (t denotes the time since injection through the shock, in the comoving blast frame). We find that these models point to a consistent value of the decay exponent -0.5 less than or similar to alpha(t) less than or similar to -0.4.

Funding ProjectINP (CNRS) ; NSFC[11273005] ; NSFC[11273016] ; NSFC[10973008] ; NSFC[11033002] ; MOE PhD Programmes Foundation, China[20120001110064] ; CAS Open Research Programme of Key Laboratory for the Structure and Evolution of Celestial Objects ; 973 Programme[2009CB824800] ; Excellent Youth Foundation of Jiangsu Province[BK2012011]
Funding OrganizationINP (CNRS) ; NSFC[11273005, 11273016, 10973008, 11033002] ; MOE PhD Programmes Foundation, China[20120001110064] ; CAS Open Research Programme of Key Laboratory for the Structure and Evolution of Celestial Objects ; 973 Programme[2009CB824800] ; Excellent Youth Foundation of Jiangsu Province[BK2012011]
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000325774700018
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordHIGH-ENERGY EMISSION ; RELATIVISTIC COLLISIONLESS SHOCKS ; PARTICLE-ACCELERATION ; LIGHT CURVES ; AFTERGLOW OBSERVATIONS ; SPECTRAL COMPONENT ; GRB 090902B ; FERMI ; SYNCHROTRON ; PARAMETERS
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9418
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorLemoine, Martin
Affiliation1.Institut d'Astrophysique de Paris, CNRS, UPMC, 98 bis boulevard Arago, F-75014 Paris, France
2.Department of Astronomy/Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
4.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, China
5.Key laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210093, China
Recommended Citation
GB/T 7714
Lemoine, Martin,Li, Zhuo,Wang, Xiang-Yu. On the magnetization of gamma-ray burst blast waves[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,435(4):3009-3016.
APA Lemoine, Martin,Li, Zhuo,&Wang, Xiang-Yu.(2013).On the magnetization of gamma-ray burst blast waves.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,435(4),3009-3016.
MLA Lemoine, Martin,et al."On the magnetization of gamma-ray burst blast waves".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 435.4(2013):3009-3016.
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