DOI: 10.1002/2014GL060902
论文题名: The precipitation of keV energetic oxygen ions at Mars and their effects during the comet Siding Spring approach
作者: Gronoff G. ; Rahmati A. ; Wedlund C.S. ; Mertens C.J. ; Cravens T.E. ; Kallio E.
刊名: Geophysical Research Letters
ISSN: 0094-9937
EISSN: 1944-9668
出版年: 2014
卷: 41, 期: 14 起始页码: 4844
结束页码: 4850
语种: 英语
英文关键词: comet
; Mars
; pickup
Scopus关键词: Dust
; Ionization
; Ionosphere
; Ions
; Pickups
; comet
; Cometary activity
; Dust hazards
; Energetic oxygen ions
; Mars
; Orders of magnitude
; Precipitation (chemical)
; airglow
; anion
; comet
; ionosphere
; Mars
; Martian atmosphere
; oxygen
; solar wind
英文摘要: Comet Siding Spring C/2013 A1 will pass Mars on 19 October 2014, entailing particle and dust precipitation in the Martian upper atmosphere and a potential dust hazard for orbiters. An estimate of the flux of energetic O+ ions picked up by the solar wind from the cometary coma is shown, with an increase of the O+ flux above 50 keV by 2 orders of magnitude. While the ionization of Mars' upper atmosphere by precipitating O+ ions is expected to be negligible compared to solar EUV-XUV ionization, it is of the same order of magnitude at 110 km altitude during the cometary passage, leading to detectable increases in ionospheric densities. Cometary O+ pickup ion precipitation is expected to be the major nightside ionization source, creating a temporary ionosphere and a global airglow. These effects are dependent on the solar and cometary activities at the time of the encounter. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904782662&doi=10.1002%2f2014GL060902&partnerID=40&md5=fd83df1a1d9e107b67ecedc29c3ae487
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7201
Appears in Collections: 气候减缓与适应
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作者单位: Science Direct., Chemistry and Dynamics Branch, NASA Langley Research Center, Hampton, VA, United States
Recommended Citation:
Gronoff G.,Rahmati A.,Wedlund C.S.,et al. The precipitation of keV energetic oxygen ions at Mars and their effects during the comet Siding Spring approach[J]. Geophysical Research Letters,2014-01-01,41(14).