DOI: 10.1002/2015GL065720
论文题名: Estimation of the spatial structure of a detached magnetic flux rope at Mars based on simultaneous MAVEN plasma and magnetic field observations
作者: Hara T. ; Mitchell D.L. ; McFadden J.P. ; Seki K. ; Brain D.A. ; Halekas J.S. ; Harada Y. ; Espley J.R. ; DiBraccio G.A. ; Connerney J.E.P. ; Andersson L. ; Mazelle C. ; Jakosky B.M.
刊名: Geophysical Research Letters
ISSN: 0094-8520
EISSN: 1944-8251
出版年: 2015
卷: 42, 期: 21 起始页码: 8933
结束页码: 8941
语种: 英语
英文关键词: Atmospheric escape
; Crustal magnetic field
; Flux rope
; Grad-Shafranov equation
; Mars
; MAVEN
Scopus关键词: Ions
; Magnetic fields
; Magnetic flux
; Magnetism
; Magnetosphere
; Rope
; Solar system
; Atmospheric escape
; Crustal magnetic fields
; Flux ropes
; Grad-Shafranov equations
; Mars
; MAVEN
; Magnetoplasma
; amplitude
; coronal mass ejection
; estimation method
; flux measurement
; magnetic field
; magnetosphere
; Martian atmosphere
; numerical model
; observational method
; plasma
; solar wind
; spatial analysis
英文摘要: Simultaneous Mars Atmosphere and Volatile EvolutioN mission (MAVEN) plasma and magnetic field observations reveal a detached magnetic flux rope in the Martian induced magnetosphere. The flux rope was identified by an increase in the magnetic field amplitude accompanied by smooth vector rotations. In addition, MAVEN observed a pronounced ion composition change across the structure, with solar wind ions dominating outside and planetary ions dominating within. Grad-Shafranov reconstruction is applied to determine the two-dimensional spatial structure of the flux rope. The event occurred near the dusk terminator, downstream from strong crustal magnetic fields. One possibility is that the flux rope was created by magnetic reconnection associated with interplanetary and/or crustal magnetic fields. A weak interplanetary coronal mass ejection (ICME) arrived at Mars a few hours before the event. A pressure pulse and turbulent magnetic fields due to the ICME might be responsible for driving magnetic reconnection to detach the flux rope from the crustal source. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955184350&doi=10.1002%2f2015GL065720&partnerID=40&md5=41987afc330db2550c58fb3258f8e42d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8136
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 Sciences Laboratory, University of California, Berkeley, CA, United States
Recommended Citation:
Hara T.,Mitchell D.L.,McFadden J.P.,et al. Estimation of the spatial structure of a detached magnetic flux rope at Mars based on simultaneous MAVEN plasma and magnetic field observations[J]. Geophysical Research Letters,2015-01-01,42(21).