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Linear Polarization, Circular Polarization, and Depolarization of Gamma-ray Bursts: A Simple Case of Jitter Radiation
Mao JR(毛基荣)1,2,3; Wang JC(王建成)1,2,3; Mao, Jirong(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan Province, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-04-01
卷号838期号:2
DOI10.3847/1538-4357/aa6628
产权排序第1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Linear and circular polarizations of gamma-ray bursts (GRBs) have been detected recently. We adopt a simplified model to investigate GRB polarization characteristics in this paper. A compressed two-dimensional turbulent slab containing stochastic magnetic fields is considered, and jitter radiation can produce the linear polarization under this special magnetic field topology. Turbulent Faraday rotation measure (RM) of this slab makes strong wavelength-dependent depolarization. The jitter photons can also scatter with those magnetic clumps inside the turbulent slab, and a nonzero variance of the Stokes parameter V can be generated. Furthermore, the linearly and circularly polarized photons in the optical and radio bands may suffer heavy absorptions from the slab. Thus we consider the polarized jitter radiation transfer processes. Finally, we compare our model results with the optical detections of GRB 091018, GRB 121024A, and GRB 131030A. We suggest simultaneous observations of GRB multi-wavelength polarization in the future.
项目资助者Hundred Talent Program ; Major Program of the Chinese Academy of Sciences(KJZD-EW-M06) ; National Natural Science Foundation of China(11673062, 11573060, 11661161010) ; Oversea Talent Program of Yunnan Province ; Strategic Priority Research Program, "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000398118500002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]RELATIVISTIC COLLISIONLESS SHOCKS ; MAGNETIC-FIELD STRUCTURE ; FULLY-DEVELOPED TURBULENCE ; EARLY OPTICAL AFTERGLOWS ; EXTENDED RADIO-SOURCES ; SYNCHROTRON-RADIATION ; PROMPT EMISSION ; LIGHT CURVES ; GRB 041219A ; VARIABLE POLARIZATION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/10012
专题丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
通讯作者Mao, Jirong(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan Province, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, Yunnan Province, China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
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Mao JR,Wang JC,Mao, Jirong. Linear Polarization, Circular Polarization, and Depolarization of Gamma-ray Bursts: A Simple Case of Jitter Radiation[J]. ASTROPHYSICAL JOURNAL,2017,838(2).
APA Mao JR,Wang JC,&Mao, Jirong.(2017).Linear Polarization, Circular Polarization, and Depolarization of Gamma-ray Bursts: A Simple Case of Jitter Radiation.ASTROPHYSICAL JOURNAL,838(2).
MLA Mao JR,et al."Linear Polarization, Circular Polarization, and Depolarization of Gamma-ray Bursts: A Simple Case of Jitter Radiation".ASTROPHYSICAL JOURNAL 838.2(2017).
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