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Analysis of magnetotail flux rope events by ARTEMIS observations

Science China(Technological Sciences) 2014年第5期57卷 1010-1019页

作者： TIAN AnMin SHI QuanQi ZONG QiuGang DU Jian FU SuiYan DAI YaNan School of Space Science and Physics Shandong University at Weihai State Key Laboratory of space weather Chinese Academy of Sciences Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of space physics and Applied Technology Peking University

Three earthward flowing magnetic flux ropes observed in the duskside plasma sheet at geocentric solar magnetospheric coordinate X~–55 Re by P1 and P2 of acceleration,reconnection,turbulence and electrodynamics of moon’s interaction with the sun mission during 13:00–15:00 UT on July 3,2012,were *** morphologies of the flux ropes were studied in detail based on Grad-Shfranov reconstruction method and electronic pitch angle distribution *** is found that(1)the flux rope cross-sectional dimensions are 1.0 Re×0.78 Re,1.3 Re×0.78 Re,and 2.5 Re×1.25 Re,*** magnetic field lines were asymmetric about the center with field line compression on both sides of the current sheet at the leading region;(2)the electron energy flux data presented asymmetry with larger electron flux and lower temperature in the precursor *** flux ropes were blocked by the resistance of compressed particle density in the front central plasma sheet and the enhanced magnetic field on its sides;and(3)it is found that the flux rope has a layered *** inside out,event 1 can be divided into three regions,namely electronic depletion core region,closed field line region,and the caudal area possible with fields connected with the *** suggests that the flux ropes cannot merge with the tail magnetic field lines near the lunar ***,the flux rope asymmetrical shape reflects the different reconnection processes that caused it on both sides of the magnetic *** events shown in this paper support the multiple X-line magnetic reconnection model for flux ropes with in situ observations.

关键词： magnetic flux ropes ARTEMIS GS reconstruction method asymmetry

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