DOI: 10.1002/2017JA025079
Scopus记录号: 2-s2.0-85045706636
论文题名: Near-Earth Reconnection Ejecta at Lunar Distances
作者: Runov A. ; Angelopoulos V. ; Artemyev A. ; Lu S. ; Zhou X.-Z.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 4 起始页码: 2736
结束页码: 2744
语种: 英语
英文关键词: magnetosphere
; magnetotail
; particle distribution
; plasma energization
; plasma sheet
; reconnection
英文摘要: Near-Earth magnetotail reconnection leads to formation of earthward and tailward directed plasma outflows with an increased north-south magnetic field strength(|Bz|) at their leading edges. We refer to these regions of enhanced |Bz| and magnetic flux transport Ey as reconnection ejecta. They are composed of what have been previously referred to as earthward dipolarizing flux bundles (DFBs) and tailward rapid flux transport (RFT) events. Using two-point observations of magnetic and electric fields and particle fluxes by the Acceleration, Reconnection, Turbulence, and Electrodynamics of Moon's Interaction with the Sun probes orbiting around Moon at geocentric distances R ∼ 60RE, we statistically studied plasma moments and particle energy spectra in RFTs and compared them with those observed within DFBs in the near-Earth plasma sheet by the Time History of Events and Macroscale Interactions during Substorms probes. We found that the ion average temperatures and spectral slopes in RFTs at R ∼ 60RE are close to those in DFBs observed at 15 < R < 25RE, just earthward of the probable reconnection region location. Assuming plasma sheet pressure balance, the average RFT ion temperature corresponds to a lobe field BL∼20 nT. This leads us to suggest that the ion population within the tailward ejecta originated in the midtail plasma sheet at 20≤R≤30RE and propagated to the Acceleration, Reconnection, Turbulence, and Electrodynamics of Moon's Interaction with the Sun location without undergoing any further energy gain. Conversely, electron temperatures in DFBs at 15 < R < 25RE are a factor of 2.5 higher than those in RFTs at R ∼ 60RE. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114138
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Geophysics and Planetary Physics, Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States; Institute of Space Physics and Applied Techonolgy, Peking University, Peking, China
Recommended Citation:
Runov A.,Angelopoulos V.,Artemyev A.,et al. Near-Earth Reconnection Ejecta at Lunar Distances[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(4)