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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
Energetic Electron Acceleration in Unconfined Reconnection Jets

文献类型：期刊论文

作者Chen, G.1,2,3; Fu, H. S.4; Zhang, Y.1,2,3; Li, Xiaocan5; Ge, Y. S.1,2,3; Du, A. M.1,2,3; Liu, C. M.4; Xu, Y.4
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2019-08-10
卷号881期号:1页码:6
关键词acceleration of particles magnetic reconnection
ISSN号2041-8205
DOI10.3847/2041-8213/ab3041
英文摘要Magnetic reconnection in astronomical objects such as solar corona and the Earth's magnetotail theoretically produces a fast jet toward the object (known as a confined jet as it connects to the object through magnetic field lines) and a fast jet departing the object (known as an unconfined jet as it propagates freely in space). So far, energetic electron acceleration has been observed in the confined jet but never in the unconfined jet, arousing a controversy about whether or not reconnection jets can intrinsically accelerate electrons. By analyzing spacecraft measurements in the magnetotail, here we report three events showing strong electron energization in unconfined reconnection jets. Such energization, occurring in the growing phase of the jet, is quasi-adiabatic; it leads to 30 times of flux enhancements and it is probably caused by the compression of the magnetic field (betatron effect) as well as the shrinking of magnetic field lines (Fermi effect). We quantitatively reproduce this energization process using a 2.5D particle-in-cell simulation. This finding implies that electron acceleration can happen in the solar wind and magnetosheath, where reconnection jets are usually unconfined.
WOS关键词ROLLING-PIN DISTRIBUTION ; BURSTY BULK FLOWS ; MAGNETIC RECONNECTION ; DIPOLARIZATION FRONTS ; PARTICLE-ACCELERATION ; DENSITY ; MMS
资助项目NSFC[41874080] ; NSFC[41674168] ; NSFC[41404133] ; NSFC[41874188] ; NSFC[41574153] ; NSFC[40621003] ; NSFC[41431071] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14040403]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000478957500008
出版者IOP PUBLISHING LTD
资助机构NSFC ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NSFC ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NSFC ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NSFC ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/92914]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Fu, H. S.
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Beihang Univ, Sch Space & Environm, Beijing 100083, Peoples R China
5.Los Alamos Natl Lab, Los Alamos, NM 87545 USA
推荐引用方式
GB/T 7714		 Chen, G.,Fu, H. S.,Zhang, Y.,et al. Energetic Electron Acceleration in Unconfined Reconnection Jets[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,881(1):6.
APA Chen, G..,Fu, H. S..,Zhang, Y..,Li, Xiaocan.,Ge, Y. S..,...&Xu, Y..(2019).Energetic Electron Acceleration in Unconfined Reconnection Jets.ASTROPHYSICAL JOURNAL LETTERS,881(1),6.
MLA Chen, G.,et al."Energetic Electron Acceleration in Unconfined Reconnection Jets".ASTROPHYSICAL JOURNAL LETTERS 881.1(2019):6.

入库方式： OAI收割

来源：地质与地球物理研究所

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