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题名: Plasma Heating and Alfvenic Turbulence Enhancement During Two Steps of Energy Conversion in Magnetic Reconnection Exhaust Region of Solar Wind
作者: He Jiansen; Zhu Xingyu; Chen Yajie; Chadi, Salem; Michael, Stevens; Hui, Li; Ruan Wenzhi; Lei, Zhang; Tu Chuanyi
作者部门: 空间科学部
通讯作者: He Jiansen ; Zhu Xingyu ; Chen Yajie ; Chadi, Salem ; Michael, Stevens ; Hui, Li ; Ruan Wenzhi ; Lei, Zhang ; Tu Chuanyi
关键词: magnetic reconnection ; solar wind ; turbulence
刊名: ASTROPHYSICAL JOURNAL
ISSN号: 0004-637X
出版日期: 2018
卷号: 856, 期号:2, 页码:148
收录类别: SCI
项目资助者: National Natural Science Foundation of China (NSFC) [41574168, 41222032, 41231069, 41474147, 41674171, 41421003] ; National Young Talent Program of China ; NASA [NNX14AT26G]
英文摘要: The magnetic reconnection exhaust is a pivotal region with enormous magnetic energy being continuously released and converted. The physical processes of energy conversion involved are so complicated that an all-round understanding based on in situ measurements is still lacking. We present the evidence of plasma heating by illustrating the broadening of proton and electron velocity distributions, which are extended mainly along the magnetic field, in an exhaust of interchange reconnection between two interplanetary magnetic flux tubes of the same polarity on the Sun. The exhaust is asymmetric across an interface, with both sides being bounded by a pair of compound discontinuities consisting of rotational discontinuity and slow shock. The energized plasmas are found to be firehose unstable, and responsible for the emanation of Alfven waves during the second step of energy conversion. It is realized that the energy conversion in the exhaust can be a two-step process involving both plasma energization and wave emission.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6238
Appears in Collections:空间科学部_期刊论文

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