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The Faraday rotation in the pulsar magnetosphere
Wang, Chen1; Han, J. L.1; Lai, Dong2
2011-10-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume417Issue:2Pages:1183-1191
AbstractThe 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.
KeywordPolarization Radiative Transfer Stars: Magnetic Field Pulsars: General
DOI10.1111/j.1365-2966.2011.19333.x
Indexed BySCI
Language英语
WOS IDWOS:000297043000026
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7824
Collection射电天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
Recommended Citation
GB/T 7714
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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