DOI: 10.1002/2015GL066820
论文题名: Development of bifurcated current sheets in solar wind reconnection exhausts
作者: Mistry R. ; Eastwood J.P. ; Phan T.D. ; Hietala H.
刊名: Geophysical Research Letters
ISSN: 0094-8298
EISSN: 1944-8029
出版年: 2015
卷: 42, 期: 24 起始页码: 10513
结束页码: 10520
语种: 英语
英文关键词: reconnection
; solar wind
Scopus关键词: Bifurcation (mathematics)
; Solar wind
; Current sheets
; Ion skin depth
; Measurements of
; Near-Earth magnetotail
; Reconnection
; Reconnection sites
; Spacecraft
; bifurcation
; current direction
; geometry
; geophysical survey
; magnetic field
; magnetotail
; numerical model
; observational method
; solar wind
; spacecraft
英文摘要: Petschek-type reconnection is expected to result in bifurcations of reconnection current sheets. In contrast, Hall reconnection simulations show smooth changes in the reconnecting magnetic field. Here we study three solar wind reconnection events where different spacecraft sample oppositely directed reconnection exhausts from a common reconnection site. The spacecraft's relative separations and measurements of the exhaust width are used to geometrically calculate each spacecraft's distance from the X line. We find that in all cases spacecraft farthest from the X line observe clearly bifurcated reconnection current sheets, while spacecraft nearer to the X line do not. These observations suggest that clear bifurcations of reconnection current sheets occur at large distances from the X line (~1000 ion skin depths) and that Petschek-type signatures are less developed close to the reconnection site. This may imply that fully developed bifurcations of reconnection current sheets are unlikely to be observed in the near-Earth magnetotail. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955190725&doi=10.1002%2f2015GL066820&partnerID=40&md5=4576038d6df94869d73d34984fbf5243
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7914
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 and Atmospheric Physics, Blackett Laboratory, Imperial College London, London, United Kingdom
Recommended Citation:
Mistry R.,Eastwood J.P.,Phan T.D.,et al. Development of bifurcated current sheets in solar wind reconnection exhausts[J]. Geophysical Research Letters,2015-01-01,42(24).