| DOI: | 10.1002/2014GL060608
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| 论文题名: | Highly structured electron anisotropy in collisionless reconnection exhausts |
| 作者: | Shuster J.R.; Chen L.-J.; Daughton W.S.; Lee L.C.; Lee K.H.; Bessho N.; Torbert R.B.; Li G.; Argall M.R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9878
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| EISSN: | 1944-9609
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| 出版年: | 2014
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| 卷: | 41, 期:15 | | 起始页码: | 5389
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| 结束页码: | 5395
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| 语种: | 英语
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| 英文关键词: | Cluster observation
; collisionless magnetic reconnection
; electron anisotropy
; electron distribution function
; reconnection exhaust
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| Scopus关键词: | Anisotropy
; Plasma simulation
; Population statistics
; Spacecraft
; Cluster observations
; Electron anisotropy
; Electron distribution function
; Magnetic reconnections
; reconnection exhaust
; Cluster spacecraft
; Collisionless reconnection
; Electron distributions
; Electron velocity distributions
; Particle-in-cell simulations
; Temporal dependence
; Electrons
; anisotropy
; collision
; magnetic field
; magnetotail
; simulation
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| 英文摘要: | Results from two-dimensional particle-in-cell simulations of collisionless magnetic reconnection with zero guide field discussed in this paper reveal that around the time when the reconnection rate peaks, electron velocity distributions become highly structured in magnetic islands and open exhausts. Rings, arcs, and counterstreaming beams are generic and lasting components of the exhaust electron distributions. The temporal dependence of electron distributions provides a perspective to explain an outstanding discrepancy concerning the degree of electron anisotropy in reconnection exhausts and enables inference of the reconnection phase based on observed anisotropic electron distributions. Some of the structures predicted by our simulations are confirmed by measurements from the Cluster spacecraft during its encounter with reconnection exhausts in the magnetotail. Key Points Exhaust electrons develop highly structured anisotropies near peak reconnection Electron ring, arc, and beam populations are lasting features of all exhausts Spacecraft data confirm some types of predicted exhaust anisotropic structures © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905601788&doi=10.1002%2f2014GL060608&partnerID=40&md5=246526edaaba61f889789d99f7cfa5fd
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7142
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Space Science Center, University of New Hampshire, Durham, NH, United States
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| Recommended Citation: | |
Shuster J.R.,Chen L.-J.,Daughton W.S.,et al. Highly structured electron anisotropy in collisionless reconnection exhausts[J]. Geophysical Research Letters,2014-01-01,41(15).
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