DOI: 10.1002/2016GL068373
论文题名: On the electron diffusion region in asymmetric reconnection with a guide magnetic field
作者: Hesse M. ; Liu Y.-H. ; Chen L.-J. ; Bessho N. ; Kuznetsova M. ; Birn J. ; Burch J.L.
刊名: Geophysical Research Letters
ISSN: 0094-9231
EISSN: 1944-8962
出版年: 2016
卷: 43, 期: 6 起始页码: 2359
结束页码: 2364
语种: 英语
英文关键词: distribution function
; kinetic physics
; magnetic reconnection
; magnetopause
; magnetospheric multiscale
; plasma physics
Scopus关键词: Distribution functions
; Electric fields
; Electrons
; Magnetic field effects
; Magnetic fields
; Magnetism
; Magnetopause
; Magnetosphere
; Plasma simulation
; Pressure effects
; Electron distributions
; Guide magnetic field
; In-plane magnetic fields
; Magnetic reconnections
; Magnetospheric multi scale
; Nongyrotropic pressure
; Particle-in-cell simulations
; Plasma physics
; Magnetoplasma
; analytical method
; asymmetry
; diffusion
; electromagnetic field
; electron
; magnetic fabric
; magnetopause
; magnetosphere
; mixing
; plasma
; prediction
; stagnation flow
英文摘要: Particle-in-cell simulations in a 2.5-D geometry and analytical theory are employed to study the electron diffusion region in asymmetric reconnection with a guide magnetic field. The analysis presented here demonstrates that similar to the case without guide field, in-plane flow stagnation and null of the in-plane magnetic field are well separated. In addition, it is shown that the electric field at the local magnetic X point is again dominated by inertial effects, whereas it remains dominated by nongyrotropic pressure effects at the in-plane flow stagnation point. A comparison between local electron Larmor radii and the magnetic gradient scale lengths predicts that distribution should become nongyrotropic in a region enveloping both field reversal and flow stagnation points. This prediction is verified by an analysis of modeled electron distributions, which show clear evidence of mixing in the critical region. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978325982&doi=10.1002%2f2016GL068373&partnerID=40&md5=224268e2b4ff54f5824cf4d7d0c13ddf
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10194
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: Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MA, United States
Recommended Citation:
Hesse M.,Liu Y.-H.,Chen L.-J.,et al. On the electron diffusion region in asymmetric reconnection with a guide magnetic field[J]. Geophysical Research Letters,2016-01-01,43(6).