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New Evidence for Magnetic Reconnection in the Tail of Interplanetary Magnetic Cloud 被引量:7

New Evidence for Magnetic Reconnection in the Tail of Interplanetary Magnetic Cloud
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摘要 We analyse the WIND data of an interplanetary magnetic cloud (MC) on 2 November 2001, and find new evidences for magnetic reconnection in the tail of this MC. In the MC tail, the largely dip and the large change of the orientation of the magnetic field occurred simultaneously, △θ≈45° and △φ changed from 90° to 320°. Correspondingly, the number density of ions increased, and the superthermal electrons were heated and accelerated, however its number density decreased. Meanwhile, inverse jets and Hall term were observed. The pitch-angle distributions of the electrons with lower energy and higher energy showed strong turbulence and bi-direction flow, respectively. The plasma wave activity enhanced near the electron plasma frequency, fpe and 2fpe. These important physical characteristics are new evidences for magnetic reconnection existing in interplanetary space. We analyse the WIND data of an interplanetary magnetic cloud (MC) on 2 November 2001, and find new evidences for magnetic reconnection in the tail of this MC. In the MC tail, the largely dip and the large change of the orientation of the magnetic field occurred simultaneously, △θ≈45° and △φ changed from 90° to 320°. Correspondingly, the number density of ions increased, and the superthermal electrons were heated and accelerated, however its number density decreased. Meanwhile, inverse jets and Hall term were observed. The pitch-angle distributions of the electrons with lower energy and higher energy showed strong turbulence and bi-direction flow, respectively. The plasma wave activity enhanced near the electron plasma frequency, fpe and 2fpe. These important physical characteristics are new evidences for magnetic reconnection existing in interplanetary space.
出处 《Chinese Physics Letters》 SCIE CAS CSCD 2005年第12期3225-3228,共4页 中国物理快报(英文版)
基金 Supported by the National Natural Science Foundation of China under Grant Nos G200078405, 40336053 and 40274052, and the International Collaboration Research Team Program of the Chinese Academy of Sciences.
关键词 SOLAR-WIND COLLISIONLESS RECONNECTION MASS EJECTION PLASMA FIELD SPACECRAFT ACCELERATION VOYAGER EVENTS HELIOS SOLAR-WIND COLLISIONLESS RECONNECTION MASS EJECTION PLASMA FIELD SPACECRAFT ACCELERATION VOYAGER EVENTS HELIOS
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