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Structures of Hall Fields in Asymmetric Magnetic Reconnection
Dai, Lei
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2018
Volume123Issue:9Pages:7332-7341
DOI10.1029/2018JA025251
ISSN2169-9380
Language英语
KeywordHall magnetic fields kinetic Alfven waves magnetic reconnection asymmetric reconnection
AbstractUnlike a quadrupolar Hall magnetic field in symmetric magnetic reconnection, a bipolar or quadrupolar Hall magnetic field occurs in asymmetric reconnection as indicated by recent observations from the Magnetospheric Multiscale (MMS) mission. Here we present analytic calculations of the structures of Hall magnetic fields in asymmetric reconnection. The Hall magnetic fields are analyzed in terms of kinetic Alfven wave eigenmodes of the reconnection layer. The bipolar and quadrupolar patterns of Hall magnetic fields correspond to a dominance of the n = 0 and n = 1 kinetic Alfven wave eigenmode, respectively. The asymmetry of Hall fields is linked to the asymmetry of the Alfve speed profile. The Hall magnetic fields are shifted toward and enhanced on the low Alfven speed side of the reconnection layer. The asymmetry in the magnetic field strength of the reconnection layer has a major effect on the structures of Hall magnetic fields.
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6570
Collection空间科学部
Recommended Citation
GB/T 7714
Dai, Lei. Structures of Hall Fields in Asymmetric Magnetic Reconnection[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2018,123(9):7332-7341.
APA Dai, Lei.(2018).Structures of Hall Fields in Asymmetric Magnetic Reconnection.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,123(9),7332-7341.
MLA Dai, Lei."Structures of Hall Fields in Asymmetric Magnetic Reconnection".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 123.9(2018):7332-7341.
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