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Structures of Hall Fields in Asymmetric Magnetic Reconnection
Dai, Lei
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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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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