| DOI: | 10.1002/2015GL065262
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| 论文题名: | MAVEN insights into oxygen pickup ions at Mars |
| 作者: | Rahmati A.; Larson D.E.; Cravens T.E.; Lillis R.J.; Dunn P.A.; Halekas J.S.; Connerney J.E.; Eparvier F.G.; Thiemann E.M.B.; Jakosky B.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8532
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| EISSN: | 1944-8263
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| 出版年: | 2015
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| 卷: | 42, 期:21 | | 起始页码: | 8870
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| 结束页码: | 8876
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| 语种: | 英语
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| 英文关键词: | Mars
; MAVEN
; oxygen escape
; pickup ions
; SEP
; solar wind
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| Scopus关键词: | Charge transfer
; Impact ionization
; Ionization
; Ionosphere
; Ions
; Pickups
; Solar wind
; Charge exchanges
; Mars
; MAVEN
; Model-data comparisons
; Pick-up ions
; SEP
; Solar energetic particles
; Volatile evolution
; Oxygen
; energy dissipation
; flux measurement
; instrumentation
; ion exchange
; ionization
; Mars
; Martian atmosphere
; oxygen
; solar activity
; solar wind
; spacecraft
; temporal analysis
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| 英文摘要: | Since Mars Atmosphere and Volatile EvolutioN (MAVEN)'s arrival at Mars on 21 September 2014, the SEP (Solar Energetic Particle) instrument on board the MAVEN spacecraft has been detecting oxygen pickup ions with energies of a few tens of keV up to ~200 keV. These ions are created in the distant upstream part of the hot atomic oxygen exosphere of Mars, via photoionization, charge exchange with solar wind protons, and electron impact. Once ionized, atomic oxygen ions are picked up by the solar wind and accelerated downstream, reaching energies high enough for SEP to detect them. We model the flux of oxygen pickup ions observed by MAVEN SEP in the undisturbed upstream solar wind and compare our results with SEP's measurements. Model-data comparisons of SEP fluxes confirm that pickup oxygen associated with the Martian exospheric hot oxygen is indeed responsible for the MAVEN SEP observations. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955183991&doi=10.1002%2f2015GL065262&partnerID=40&md5=33d997ec8aa4d8418d0842e57c22b238
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8148
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| 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 Kansas, Lawrence, KS, United States
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| Recommended Citation: | |
Rahmati A.,Larson D.E.,Cravens T.E.,et al. MAVEN insights into oxygen pickup ions at Mars[J]. Geophysical Research Letters,2015-01-01,42(21).
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