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The change of GRB polarization angles in the magnetic-dominated jet model
Chang Z(常哲); 林海南;Chang, Z; Lin, HN
2014
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号445期号:4页码:4105-4109
摘要The polarimetric measurement on the prompt phase of GRB 100826A shows that the polarization angle changes similar to 90 degrees between two adjacent time intervals. We will show that this phenomenon can be naturally interpreted in the framework of the magnetic-dominated jet (MDJ) model. The MDJ model suggests that the bulk Lorentz factor of the outflow increases as Gamma proportional to r(1/3), until reaching a saturated value Gamma(sat). Electrons move in the globally ordered magnetic field advected by the jet from the central engine and produce synchrotron photons. The polarized synchrotron photons travel alone the jet direction and then collide with the cold electrons at the front of the jet. After the Compton scattering process, these photons escape from the jet and are detected by the observer locating slightly off-axis. If photons are emitted before the bulk Lorentz factor saturates, the change of polarization angle is a natural result of the acceleration of the outflow.
关键词polarization radiation mechanisms: non-thermal scattering gamma-ray burst: individual: GRB 100826A
学科领域Astronomy & Astrophysics
DOI10.1093/mnras/stu2051
收录类别SCI
WOS记录号WOS:000346963300059
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被引频次:2[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/311005/225194
专题理论物理室
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Chang Z,林海南;Chang, Z,Lin, HN. The change of GRB polarization angles in the magnetic-dominated jet model[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,445(4):4105-4109.
APA 常哲,林海南;Chang, Z,&Lin, HN.(2014).The change of GRB polarization angles in the magnetic-dominated jet model.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,445(4),4105-4109.
MLA 常哲,et al."The change of GRB polarization angles in the magnetic-dominated jet model".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 445.4(2014):4105-4109.
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