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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
Observations of a Mini-Magnetosphere Above the Martian Crustal Magnetic Fields

文献类型：期刊论文

作者Fan, Kai2; Wei, Yong2,3; Fraenz, Markus4; Cui, Jun1; He, Fei2,3; Yan, Limei2,3; Chai, Lihui2,3; Zhong, Jun2; Rong, Zhaojin2,3; Dubinin, Eduard4
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2023-11-16
卷号50期号:21页码:11
ISSN号0094-8276
DOI10.1029/2023GL103999
英文摘要Mars is typically regarded as a non-magnetic planet. Currents in the Martian ionosphere generate a Venus-like induced magnetosphere which deflects the solar wind flows and piles up the interplanetary magnetic fields. However, crustal magnetic fields in the southern hemisphere influence local plasma properties. Using observations from the MAVEN mission, we characterize the distinguishing plasma characteristics of a mini-magnetosphere that forms on the Martian dayside. We establish three criteria to differentiate this mini-magnetosphere from the induced magnetosphere. Notably, the mini-magnetosphere exhibits higher plasma beta (values near 1), with a balance between planetary ions, crustal magnetic fields, and the solar wind at the magnetopause. Observations show that the crustal magnetosphere reaches an altitude of 1,300 km, larger than one-third of the Martian radius, indicating a dichotomy between the induced northern and the crustal southern magnetospheres. These findings offer novel insights into the distinctive properties of hybrid magnetospheres in the near-Mars space. Mars lacks a global intrinsic magnetic field. Currents in the Martian ionosphere generate a Venus-like induced magnetosphere which deflects the solar wind flow and piles up the interplanetary magnetic field. However, local crustal magnetic fields in Mars' southern hemisphere significantly influence the nearby plasma. With the support of the MAVEN mission, this work analyses observations from passes of the spacecraft through the mini-magnetosphere during suitable orbits and investigates plasma pressures in both single orbit data and by a 4-year statistical analysis. We present an observation of a mini-magnetosphere filled by trapped heavy ions above the crustal magnetic fields on the Martian dayside. Furthermore, we establish three criteria to distinguish this mini-magnetosphere from the induced magnetosphere. Observations show that the mini-magnetosphere reaches an altitude of 1,300 km, larger than one-third of the Martian radius. The observed mini-magnetosphere and the dichotomy between the crustal southern and induced northern Martian magnetosphere forms a distinct environment that may help us to test the interactions between stellar winds and magnetic or nonmagnetic bodies. The crustal magnetic fields trap ionospheric plasma to form a mini-magnetosphere in the near-Mars plasma environmentThe mini-magnetosphere reaches 1,300 km on the Martian daysideThe mini-magnetosphere balances the solar wind through contributions from plasma thermal pressure and the crustal magnetic pressure
WOS关键词MARS ; VENUS ; IONOSPHERE ; ESCAPE
资助项目National Natural Science Foundation of China[42104171] ; Key Research Program of Chinese Academy of Sciences[ZDBS-SSW-TLC00103] ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR)[50QM1703] ; Youth Innovation Promotion Association of CAS[2021064]
WOS研究方向Geology
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:001094996600001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; German Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association of CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/110694]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Wei, Yong
作者单位1.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Max Planck Inst Solar Syst Res, Gottingen, Germany
推荐引用方式
GB/T 7714		 Fan, Kai,Wei, Yong,Fraenz, Markus,et al. Observations of a Mini-Magnetosphere Above the Martian Crustal Magnetic Fields[J]. GEOPHYSICAL RESEARCH LETTERS,2023,50(21):11.
APA Fan, Kai.,Wei, Yong.,Fraenz, Markus.,Cui, Jun.,He, Fei.,...&Dubinin, Eduard.(2023).Observations of a Mini-Magnetosphere Above the Martian Crustal Magnetic Fields.GEOPHYSICAL RESEARCH LETTERS,50(21),11.
MLA Fan, Kai,et al."Observations of a Mini-Magnetosphere Above the Martian Crustal Magnetic Fields".GEOPHYSICAL RESEARCH LETTERS 50.21(2023):11.

入库方式： OAI收割

来源：地质与地球物理研究所

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