Reconnection rates and X line motion at the magnetopause : Global 2D-3V hybrid-Vlasov simulation results

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http://hdl.handle.net/10138/224164

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Hoilijoki , S , Ganse , U , Pfau-Kempf , Y , Cassak , P A , Walsh , B M , Hietala , H , von Alfthan , S & Palmroth , M 2017 , ' Reconnection rates and X line motion at the magnetopause : Global 2D-3V hybrid-Vlasov simulation results ' , Journal of geophysical research. Space physics , vol. 122 , no. 3 , pp. 2877-2888 . https://doi.org/10.1002/2016JA023709

Title: Reconnection rates and X line motion at the magnetopause : Global 2D-3V hybrid-Vlasov simulation results
Author: Hoilijoki, Sanni; Ganse, Urs; Pfau-Kempf, Yann; Cassak, Paul A.; Walsh, Brian M.; Hietala, Heli; von Alfthan, Sebastian; Palmroth, Minna
Other contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics

Date: 2017-03
Language: eng
Number of pages: 12
Belongs to series: Journal of geophysical research. Space physics
ISSN: 2169-9380
DOI: https://doi.org/10.1002/2016JA023709
URI: http://hdl.handle.net/10138/224164
Abstract: We present results from a first study of the local reconnection rate and reconnection site motion in a 2D-3V global magnetospheric self-consistent hybrid-Vlasov simulation with due southward interplanetary magnetic field. We observe magnetic reconnection at multiple locations at the dayside magnetopause and the existence of magnetic islands, which are the 2-D representations of flux transfer events. The reconnection locations (the X lines) propagate over significant distances along the magnetopause, and reconnection does not reach a steady state. We calculate the reconnection rate at the location of the X lines and find a good correlation with an analytical model of local 2-D asymmetric reconnection. We find that despite the solar wind conditions being constant, the reconnection rate and location of the X lines are highly variable. These variations are caused by magnetosheath fluctuations, the effects of neighboring X lines, and the motion of passing magnetic islands.
Subject: magnetic reconnection
magnetopause
hybrid-Vlasov
numerical modeling
magnetosheath
FLUX-TRANSFER EVENTS
INTERPLANETARY MAGNETIC-FIELD
DAYSIDE MAGNETOPAUSE
CLUSTER OBSERVATIONS
EARTHS MAGNETOPAUSE
THEMIS OBSERVATIONS
MIRROR STRUCTURES
PLASMA-FLOW
MAGNETOSHEATH
MODEL
115 Astronomy, Space science
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