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GAMMA-RAY BURST POLARIZATION VIA COMPTON SCATTERING PROCESS
Chang Z(常哲); 林海南;Chang, Z; Lin, HN; Jiang, Y
2014
发表期刊ASTROPHYSICAL JOURNAL
卷号783期号:1页码:30
摘要Synchrotron radiation and Compton scattering are widely accepted as the most likely emission mechanisms of some astrophysical phenomena, such as gamma-ray bursts (GRBs) and active galactic nuclei. The measurement of the polarization of photons provides a useful tool to distinguish different emission mechanisms and structures of the emission region. Based on the differential cross section of a polarized photon scattered by an unpolarized electron of any initial momentum, we derive an analytical formula of polarization for beamed photons scattered by isotropic electrons with a power-law distribution. Numerical calculations are carried out in four special cases: electrons at rest, Thomson limit, head-on collision, and monochromatic electrons. It is found that the maximum polarization can be as high as 100% for low energy photons, if the electrons are at rest. Although polarization is highly suppressed due to the isotropic electrons, a maximum value of similar to 10%-20% can still be achieved. The Compton scattering process can be used to explain the polarization of GRB 041219A and GRB 100826A.
关键词polarization radiation mechanisms: non-thermal scattering
学科领域Astronomy & Astrophysics
DOI10.1088/0004-637X/783/1/30
收录类别SCI
WOS记录号WOS:000334919600030
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224842
专题理论物理室
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Chang Z,林海南;Chang, Z,Lin, HN,et al. GAMMA-RAY BURST POLARIZATION VIA COMPTON SCATTERING PROCESS[J]. ASTROPHYSICAL JOURNAL,2014,783(1):30.
APA 常哲,林海南;Chang, Z,Lin, HN,&Jiang, Y.(2014).GAMMA-RAY BURST POLARIZATION VIA COMPTON SCATTERING PROCESS.ASTROPHYSICAL JOURNAL,783(1),30.
MLA 常哲,et al."GAMMA-RAY BURST POLARIZATION VIA COMPTON SCATTERING PROCESS".ASTROPHYSICAL JOURNAL 783.1(2014):30.
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