The evidence for the evolution of interplanetary small flux ropes: Boundary layers  

作　　者：FENG HengQiang WANG JieMin WU DeJin 

机构地区：[1]College of Physics and Electronic Information,Luoyang Normal University,Luoyang 471022,China [2]State Key Laboratory of Space Weather,Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100190,China [3]Key Laboratory of Solar Activity,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China [4]Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008,China

出　　处：《Chinese Science Bulletin》2012年第12期1415-1420,共6页

基　　金：supported by the National Natural Science Foundation of China(41074124,40804034 and 40890162);the Program for Science & Technology Innovation Talents in Universities of Henan Province(HASTIT)(2010HASTIT022);the Specialized Research Fund for State Key Laboratories and Key Laboratory of Solar Activity and the Program for Science & Technology of Henan(092300410189)

摘　　要：We have examined the Wind data in 1996 and identified 21 small interplanetary magnetic flux ropes(SIMFRs),and all the 21 SIMFRs have boundary layer structures.The durations of the boundary layers varied from several minutes to 30 minutes.These boundary layers also have properties of high proton temperature,density,and plasma beta.These boundary layers are formed by magnetic reconnections.In addition,in three events magnetic reconnections were occurring inside the boundary layers.It indicates that the flux rope structures have propagated for some period of time,and their boundaries were still evolving through interaction with the background solar wind.Namely it is very possible that the SIMFRs came from the solar corona.We have examined the Wind data in 1996 and identified 21 small interplanetary magnetic flux ropes （SIMFRs）, and all the 21 SIMFRs have boundary layer structures. The durations of the boundary layers varied from several minutes to 30 minutes. These boundary layers also have properties of high proton temperature, density, and plasma beta. These boundary layers are formed by magnetic reconnections. In addition, in three events magnetic reconnections were occurring inside the boundary layers. It indicates that the flux rope structures have propagated for some period of time, and their boundaries were still evolving through interaction with the background solar wind. Namely it is very possible that the SIMFRs came from the solar corona.

关 键 词：边界层结构 行星际 证据 演化 通量 持续时间 相互作用 磁重联 

分 类 号：P353.2[天文地球—空间物理学]