DOI: 10.1002/2015GL064693
论文题名: MAVEN observations of solar wind hydrogen deposition in the atmosphere of Mars
作者: Halekas J.S. ; Lillis R.J. ; Mitchell D.L. ; Cravens T.E. ; Mazelle C. ; Connerney J.E.P. ; Espley J.R. ; Mahaffy P.R. ; Benna M. ; Jakosky B.M. ; Luhmann J.G. ; McFadden J.P. ; Larson D.E. ; Harada Y. ; Ruhunusiri S.
刊名: Geophysical Research Letters
ISSN: 0094-8510
EISSN: 1944-8241
出版年: 2015
卷: 42, 期: 21 起始页码: 8901
结束页码: 8909
语种: 英语
英文关键词: atmosphere
; ENA
; hydrogen
; Mars
; MAVEN
Scopus关键词: Charge transfer
; Earth atmosphere
; Electromagnetic fields
; Hydrogen
; Ionosphere
; Magnetosphere
; Solar wind
; Backscattered particles
; Collisional interactions
; ENA
; Energetic neutral atoms
; Mars
; Martian atmospheres
; MAVEN
; Solar wind velocity
; Solar power generation
; altitude
; backscatter
; corona
; correlation
; electric field
; electromagnetic field
; electron
; energy dissipation
; flux measurement
; hydrogen
; Martian atmosphere
; observational method
; particle motion
; solar wind
; wind velocity
英文摘要: Mars Atmosphere and Volatile EvolutioN mission (MAVEN) observes a tenuous but ubiquitous flux of protons with the same energy as the solar wind in the Martian atmosphere. During high flux intervals, we observe a corresponding negative hydrogen population. The correlation between penetrating and solar wind fluxes, the constant energy, and the lack of a corresponding charged population at intermediate altitudes implicate products of hydrogen energetic neutral atoms from charge exchange between the upstream solar wind and the exosphere. These atoms, previously observed in neutral form, penetrate the magnetosphere unaffected by electromagnetic fields (retaining the solar wind velocity), and some fraction reconvert to charged form through collisions with the atmosphere. MAVEN characterizes the energy and angular distributions of both penetrating and backscattered particles, potentially providing information about the solar wind, the hydrogen corona, and collisional interactions in the atmosphere. The accretion of solar wind hydrogen may provide an important source term to the Martian atmosphere over the planet's history. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955193656&doi=10.1002%2f2015GL064693&partnerID=40&md5=15ca0810ceac88d784217e019454078b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8126
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: Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States
Recommended Citation:
Halekas J.S.,Lillis R.J.,Mitchell D.L.,et al. MAVEN observations of solar wind hydrogen deposition in the atmosphere of Mars[J]. Geophysical Research Letters,2015-01-01,42(21).