Anomalous Resistivity Associated with Secondary Islands in the Reconnection Region  

作　　者：ZHOU Meng SU Wei DENG Xiao-Hua YAO Ming 周猛;苏威;邓晓华;姚明(Institute of Space Science and Technology,Nanchang University,Nanchang 330031;State Key Laboratory of Space Weather,Chinese Academy of Sciences,Beijing 100190;School of Electronic and Information,Wuhan University,Wuhan 430072)

机构地区：[1]Institute of Space Science and Technology,Nanchang University,Nanchang 330031 [2]State Key Laboratory of Space Weather,Chinese Academy of Sciences,Beijing 100190 [3]School of Electronic and Information,Wuhan University,Wuhan 430072

出　　处：《Chinese Physics Letters》2012年第8期309-312,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 41004060,40890163 and 41174147;the Specialized Research Fund for State Key Laboratories,and Scientific Research Program of Education Department of Jiangxi Province under Grant No GJJ11049.

摘　　要：We calculate the anomalous resistivity(AR)due to electrostatic waves,including possibly the lower hybrid wave and electron beam mode,around the secondary islands in the reconnection region observed by the Cluster spacecraft.Our main findings are:AR is important on the reconnection separatrix layer but heavily suppressed at the central current sheet where B_(x)~0.Moreover,there is a highly asymmetric pattern of AR across the island along the outflow direction,with much larger AR on one side of island than on the other side.Our results may be helpful in understanding the role of AR in reconnection.

关 键 词：ISLAND RECONNECTION RESISTIVITY 

分 类 号：P35[天文地球—空间物理学]