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APPLICATION OF JITTER RADIATION: GAMMA-RAY BURST PROMPT POLARIZATION
Mao JR(毛基荣)1,2,3; Wang JC(王建成)2,3
发表期刊ASTROPHYSICAL JOURNAL
2013-10-10
卷号776期号:1
DOI10.1088/0004-637X/776/1/17
产权排序第2完成单位
收录类别SCI
关键词Gamma-ray Burst: General Radiation Mechanisms: Non-thermal Shock Waves Turbulence
摘要

A high degree of polarization of gamma-ray burst (GRB) prompt emission has been confirmed in recent years. In this paper, we apply jitter radiation to study the polarization feature of GRB prompt emission. In our framework, relativistic electrons are accelerated by turbulent acceleration. Random and small-scalemagnetic fields are generated by turbulence. We further determine that the polarization property of GRB prompt emission is governed by the configuration of the random and small-scale magnetic fields. A two-dimensional compressed slab, which contains a stochastic magnetic field, is applied in our model. If the jitter condition is satisfied, the electron deflection angle in the magnetic field is very small and the electron trajectory can be treated as a straight line. A high degree of polarization can be achieved when the angle between the line of sight and the slab plane is small. Moreover, micro-emitters with mini-jet structures are considered to be within a bulk GRB jet. The jet "off-axis" effect is intensely sensitive to the observed polarization degree. We discuss the depolarization effect on GRB prompt emission and afterglow. We also speculate that the rapid variability of GRB prompt polarization may be correlated with the stochastic variability of the turbulent dynamo or the magnetic reconnection of plasmas.

资助项目Ministry of Education, Culture, Sports, Science and Technology[23105709] ; Japan Society for the Promotion of Science[19104006] ; Japan Society for the Promotion of Science[23340069] ; Global COE Program, The Next Generation of Physics, Spun from University and Emergence, from MEXT of Japan ; National Basic Research Program of China (973 Program)[2009CB824800] ; National Natural Science Foundation of China[11133006] ; National Natural Science Foundation of China[11163006] ; National Natural Science Foundation of China[11173054] ; Policy Research Program of the Chinese Academy of Sciences[KJCX2-YW-T24] ; [24.02022]
项目资助者Ministry of Education, Culture, Sports, Science and Technology[23105709] ; Japan Society for the Promotion of Science[19104006, 23340069] ; Global COE Program, The Next Generation of Physics, Spun from University and Emergence, from MEXT of Japan ; National Basic Research Program of China (973 Program)[2009CB824800] ; National Natural Science Foundation of China[11133006, 11163006, 11173054] ; Policy Research Program of the Chinese Academy of Sciences[KJCX2-YW-T24] ; [24.02022]
语种英语
学科领域天文学 ; 天体物理学 ; 高能天体物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:000324989000017
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]FULLY-DEVELOPED TURBULENCE ; TANGLED MAGNETIC-FIELDS ; EXTENDED RADIO-SOURCES ; RELATIVISTIC TURBULENCE ; LIGHT CURVES ; GRB 041219A ; SYNCHROTRON-RADIATION ; LINEAR-POLARIZATION ; AFTERGLOW EMISSION ; OPTICAL AFTERGLOW
引用统计
被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5029
专题高能天体物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Mao JR(毛基荣)
作者单位1.Astrophysical Big Bang Lab, RIKEN, Saitama 351-0198, Japan
2.Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, Yunnan Province, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
第一作者单位中国科学院云南天文台
通讯作者单位中国科学院云南天文台
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Mao JR,Wang JC. APPLICATION OF JITTER RADIATION: GAMMA-RAY BURST PROMPT POLARIZATION[J]. ASTROPHYSICAL JOURNAL,2013,776(1).
APA Mao JR,&Wang JC.(2013).APPLICATION OF JITTER RADIATION: GAMMA-RAY BURST PROMPT POLARIZATION.ASTROPHYSICAL JOURNAL,776(1).
MLA Mao JR,et al."APPLICATION OF JITTER RADIATION: GAMMA-RAY BURST PROMPT POLARIZATION".ASTROPHYSICAL JOURNAL 776.1(2013).
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