IGGCAS OpenIR  > 地球与行星物理院重点实验室
Energetic Electron Acceleration in Unconfined Reconnection Jets
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
2019-08-10
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume881Issue:1Pages:6
AbstractMagnetic 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.
Keywordacceleration of particles magnetic reconnection
DOI10.3847/2041-8213/ab3041
Funding OrganizationNSFC ; 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
WOS KeywordROLLING-PIN DISTRIBUTION ; BURSTY BULK FLOWS ; MAGNETIC RECONNECTION ; DIPOLARIZATION FRONTS ; PARTICLE-ACCELERATION ; DENSITY ; MMS
Language英语
Funding ProjectNSFC[41874080] ; NSFC[41674168] ; NSFC[41404133] ; NSFC[41874188] ; NSFC[41574153] ; NSFC[40621003] ; NSFC[41431071] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14040403]
Funding OrganizationNSFC ; 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
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000478957500008
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/92914
Collection地球与行星物理院重点实验室
Corresponding AuthorFu, H. S.
Affiliation1.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
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, G.]'s Articles
[Fu, H. S.]'s Articles
[Zhang, Y.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, G.]'s Articles
[Fu, H. S.]'s Articles
[Zhang, Y.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, G.]'s Articles
[Fu, H. S.]'s Articles
[Zhang, Y.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.