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The Faraday rotation in the pulsar magnetosphere
Wang, Chen1; Han, J. L.1; Lai, Dong2
2011-10-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号417期号:2页码:1183-1191
摘要The magnetosphere of a pulsar is composed of relativistic plasmas streaming along the magnetic field lines and corotating with the pulsar. We study the intrinsic Faraday rotation in the pulsar magnetosphere by critically examining the wave modes and the variations of polarization properties for the circularly polarized natural modes under various assumptions about the magnetosphere plasma properties. Since it is difficult to describe analytically the Faraday rotation effect in such a plasma, we use numerical integrations to study the wave propagation effects in the corotating magnetosphere. The Faraday rotation effect is identified among other propagation effects, such as wave mode coupling and the cyclotron absorption. In a highly symmetrical electronpositron pair plasma, the Faraday rotation effect is found to be negligible. Only for asymmetrical plasmas, such as the electronion streaming plasma, the Faraday rotation effect become significant, and the Faraday rotation angle is found to be approximately proportional to ?0.5 instead of the usual ?2 law. For such an electronion plasma of the pulsar magnetosphere, the induced rotation measure becomes larger at higher frequencies, and should have opposite signs for the emissions from opposite magnetic poles.
关键词Polarization Radiative Transfer Stars: Magnetic Field Pulsars: General
DOI10.1111/j.1365-2966.2011.19333.x
收录类别SCI
语种英语
WOS记录号WOS:000297043000026
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7824
专题射电天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
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Wang, Chen,Han, J. L.,Lai, Dong. The Faraday rotation in the pulsar magnetosphere[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,417(2):1183-1191.
APA Wang, Chen,Han, J. L.,&Lai, Dong.(2011).The Faraday rotation in the pulsar magnetosphere.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,417(2),1183-1191.
MLA Wang, Chen,et al."The Faraday rotation in the pulsar magnetosphere".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 417.2(2011):1183-1191.
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