GAMMA-RAY BURST POLARIZATION VIA COMPTON SCATTERING PROCESS

	GAMMA-RAY BURST POLARIZATION VIA COMPTON SCATTERING PROCESS
	Chang Z(常哲); 林海南;Chang, Z; Lin, HN; Jiang, Y
刊名	ASTROPHYSICAL JOURNAL
	2014
卷号	783 期号:1 页码:30
关键词	polarization radiation mechanisms: non-thermal scattering
英文摘要	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.
学科主题	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000334919600030
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224842]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	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.