DOI: 10.1002/2015GL067187
论文题名: Cold ion heating at the dayside magnetopause during magnetic reconnection
作者: Toledo-Redondo S. ; André M. ; Vaivads A. ; Khotyaintsev Yu.V. ; Lavraud B. ; Graham D.B. ; Divin A. ; Aunai N.
刊名: Geophysical Research Letters
ISSN: 0094-9512
EISSN: 1944-9243
出版年: 2016
卷: 43, 期: 1 起始页码: 58
结束页码: 66
语种: 英语
英文关键词: cold ions
; magnetic reconnection
; magnetopause
Scopus关键词: Electric fields
; Electric lines
; Magnetism
; Magnetopause
; Magnetosphere
; Plasma heating
; Cold ions
; Electric field gradients
; Global parameters
; Hall electric field
; In-situ observations
; Kinetic effect
; Magnetic reconnections
; Reconnection rate
; Ions
英文摘要: Cold ions of ionospheric origin are known to be present in the magnetospheric side of the Earth's magnetopause. They can be very abundant, with densities up to 100 cm-3. These cold ions can mass load the magnetosphere, changing global parameters of magnetic reconnection, like the Alfvén speed or the reconnection rate. In addition they introduce a new length scale related to their gyroradius and kinetic effects which must be accounted for. We report in situ observations of cold ion heating in the separatrix owing to time and space fluctuations of the electric field. When this occurs, the cold ions are preheated before crossing the Hall electric field barrier. However, when this mechanism is not present cold ions can be observed well inside the reconnection exhaust. Our observations suggest that the perpendicular cold ion heating is stronger close to the X line owing to waves and electric field gradients linked to the reconnection process. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956973842&doi=10.1002%2f2015GL067187&partnerID=40&md5=26c0aa33b535e1e63a226e5bfc1eb279
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10475
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: Swedish Institute of Space Physics, Uppsala, Sweden
Recommended Citation:
Toledo-Redondo S.,André M.,Vaivads A.,et al. Cold ion heating at the dayside magnetopause during magnetic reconnection[J]. Geophysical Research Letters,2016-01-01,43(1).