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Deflection of Global Ion Flow by the Martian Crustal Magnetic Fields
Fan,Kai1,2,3; Fraenz,Markus4; Wei,Yong1,2,3; Cui,Jun5,6; Rong,Zhaojin1,2,3; Chai,Lihui1,2,3; Dubinin,Eduard4
2020-08-01
Source PublicationThe Astrophysical Journal Letters
ISSN2041-8205
Volume898Issue:2
AbstractAbstract Without the protection of a global magnetic field, erosion of the Martian ionosphere by the solar wind leads to abundant loss of atmospheric particles. Although the crustal magnetic fields in the Martian southern hemisphere are strong enough to affect the dayside-induced magnetosphere, there is still limited evidence for the deflection of the solar winds by the crustal magnetic fields. With 4 years of ion data measured by the Mars Atmosphere and Volatile EvolutioN mission, we investigate the flow pattern of protons, O+, and when the crustal fields rotate to different local times. Our result is the first evidence that suggests the crustal magnetic fields can withstand the solar wind flows on the Martian dayside and can effectively trap heavy ions below 1000 km. The gyroradii of heavy ions in the strong crustal fields regions are one order of magnitude smaller than in other regions. The trapping effect causes different flow patterns, while the crustal fields rotate to different subsolar regions but are attenuated at higher altitudes. Observations provide essential information to investigate the effect of the crustal magnetic fields on heavy-ion flows and understand the role of the crustal magnetic fields in the interaction between the solar wind and the Martian atmosphere.
KeywordMars Magnetic anomalies Solar-planetary interactions Planetary magnetosphere
DOI10.3847/2041-8213/aba519
Language英语
WOS IDIOP:2041-8205-898-2-aba519
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62721
Collection中国科学院国家天文台
Affiliation1.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, People's Republic of China
2.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China
3.Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, People's Republic of China
4.Max-Planck-Institute for Solar System Research, Goettingen, Germany; fraenz@mps.mpg.de
5.Sun Yat-Sen University, School of Atmospheric Sciences, Zhuhai, People's Republic of China
6.Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China
Recommended Citation
GB/T 7714
Fan,Kai,Fraenz,Markus,Wei,Yong,et al. Deflection of Global Ion Flow by the Martian Crustal Magnetic Fields[J]. The Astrophysical Journal Letters,2020,898(2).
APA Fan,Kai.,Fraenz,Markus.,Wei,Yong.,Cui,Jun.,Rong,Zhaojin.,...&Dubinin,Eduard.(2020).Deflection of Global Ion Flow by the Martian Crustal Magnetic Fields.The Astrophysical Journal Letters,898(2).
MLA Fan,Kai,et al."Deflection of Global Ion Flow by the Martian Crustal Magnetic Fields".The Astrophysical Journal Letters 898.2(2020).
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