DOI: 10.1002/2015GL066300
论文题名: A comet engulfs Mars: MAVEN observations of comet Siding Spring's influence on the Martian magnetosphere
作者: Espley J.R. ; DiBraccio G.A. ; Connerney J.E.P. ; Brain D. ; Gruesbeck J. ; Soobiah Y. ; Halekas J. ; Combi M. ; Luhmann J. ; Ma Y. ; Jia Y. ; Jakosky B.
刊名: Geophysical Research Letters
ISSN: 0094-8527
EISSN: 1944-8258
出版年: 2015
卷: 42, 期: 21 起始页码: 8810
结束页码: 8818
语种: 英语
英文关键词: comets
; magnetospheres
; Mars
Scopus关键词: Magnetic field effects
; Magnetic fields
; Magnetosphere
; Upper atmosphere
; Atmospheric escape
; Comets
; Incident energy
; Magnetospheric boundary
; Mars
; Mars atmosphere
; Science objectives
; Volatile evolution
; Magnetic after effect
; comet
; instrumentation
; ionosphere
; magnetic field
; magnetosphere
; Mars
; Martian atmosphere
; observational method
; plasma
; solar radiation
英文摘要: The nucleus of comet C/2013 A1 (Siding Spring) passed within 141,000 km of Mars on 19 October 2014. Thus, the cometary coma and the plasma it produces washed over Mars for several hours producing significant effects in the Martian magnetosphere and upper atmosphere. We present observations from Mars Atmosphere and Volatile EvolutioN's (MAVEN's) particles and field's instruments that show the Martian magnetosphere was severely distorted during the comet's passage. We note four specific major effects: (1) a variable induced magnetospheric boundary, (2) a strong rotation of the magnetic field as the comet approached, (3) severely distorted and disordered ionospheric magnetic fields during the comet's closest approach, and (4) unusually strong magnetosheath turbulence lasting hours after the comet left. We argue that the comet produced effects comparable to that of a large solar storm (in terms of incident energy) and that our results are therefore important for future studies of atmospheric escape, MAVEN's primary science objective. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955183416&doi=10.1002%2f2015GL066300&partnerID=40&md5=bd6a148069eddc92442c6cb3d523f5da
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8143
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: Laboratory for Planetary Magnetospheres, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Espley J.R.,DiBraccio G.A.,Connerney J.E.P.,et al. A comet engulfs Mars: MAVEN observations of comet Siding Spring's influence on the Martian magnetosphere[J]. Geophysical Research Letters,2015-01-01,42(21).