DOI: 10.1002/2015GL063601
论文题名: Spatiotemporal evolution of electron characteristics in the electron diffusion region of magnetic reconnection: Implications for acceleration and heating
作者: Shuster J.R. ; Chen L.-J. ; Hesse M. ; Argall M.R. ; Daughton W. ; Torbert R.B. ; Bessho N.
刊名: Geophysical Research Letters
ISSN: 0094-8728
EISSN: 1944-8459
出版年: 2015
卷: 42, 期: 8 起始页码: 2586
结束页码: 2593
语种: 英语
英文关键词: electron diffusion region
; magnetic reconnection
Scopus关键词: Diffusion
; Electric fields
; Electron diffusion
; Electron distributions
; Electron velocity distributions
; Field acceleration
; Magnetic reconnections
; Particle-in-cell simulations
; Spatiotemporal evolution
; Triangular structures
; Electrons
; acceleration
; collision
; electron
; inflow
; jet flow
; magnetic field
; spatiotemporal analysis
; striation
英文摘要: Based on particle-in-cell simulations of collisionless magnetic reconnection, the spatiotemporal evolution of electron velocity distributions in the electron diffusion region (EDR) is reported to illustrate how electrons are accelerated and heated. Approximately when the reconnection rate maximizes, electron distributions in the vicinity of the X line exhibit triangular structures with discrete striations and a temperature (Te) twice that of the inflow region. Te increases as the meandering EDR populations mix with inflowing electrons. As the distance from the X line increases within the electron outflow jet, the discrete populations swirl into arcs and gyrotropize by the end of the jet with Te about 3 times that of the X line. Two dominant processes increase Te and produce the spatially and temporally evolving EDR distributions: (1) electric field acceleration preferential to electrons which meander in the EDR for longer times and (2) cyclotron turning by the magnetic field normal to the reconnection layer. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929508343&doi=10.1002%2f2015GL063601&partnerID=40&md5=ebddb61f0e71393ad1733312c7a436bb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8344
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Space Science Center, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Shuster J.R.,Chen L.-J.,Hesse M.,et al. Spatiotemporal evolution of electron characteristics in the electron diffusion region of magnetic reconnection: Implications for acceleration and heating[J]. Geophysical Research Letters,2015-01-01,42(8).