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Roles of electrons and ions in formation of the current in mirror-mode structures in the terrestrial plasma sheet: Magnetospheric Multiscale observations
Wang, Guoqiang1,2; Zhang, Tielong1,3; Wu, Mingyu1; Schmid, Daniel3; Hao, Yufei4; Volwerk, Martin3
2020-03-10
Source PublicationANNALES GEOPHYSICAE
ISSN0992-7689
Volume38Issue:2Pages:309-318
Corresponding AuthorZhang, Tielong(tielong.zhang@oeaw.ac.at)
AbstractMirror-mode structures widely exist in various space plasma environments. Here, we investigate a train of mirror-mode structures in the terrestrial plasma sheet on 11 August 2017 based on the Magnetospheric Multiscale mission. We find that bipolar current densities exist in the cross section of two hole-like mirror-mode structures, referred to as magnetic dips. The bipolar current density in the magnetic dip with a size of similar to 2.2 rho(i) (the ion gyro radius) is mainly contributed by variations of the electron velocity, which is mainly formed by the magnetic gradient-curvature drift. For another magnetic dip with a size of similar to 6.6 rho(i), the bipolar current density is mainly caused by an ion bipolar velocity, which can be explained by the collective behaviors of the ion drift motions. The current density inside the mirror dip contributes to the maintenance of the hole-like structure's stable. Our observations suggest that the electrons and ions play different roles in the formation of currents in magnetic dips with different sizes.
DOI10.5194/angeo-38-309-2020
WOS KeywordDIPOLARIZATION FRONTS ; INSTABILITY ; MECHANISM ; MMS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
WOS SubjectAstronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS IDWOS:000519721900001
PublisherCOPERNICUS GESELLSCHAFT MBH
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/36108
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Tielong
Affiliation1.Harbin Inst Technol, Inst Space Sci & Appl Technol, Shenzhen, Peoples R China
2.Chinese Acad Sci, Key Lab Lunar & Deep Space Explorat, Beijing, Peoples R China
3.Austrian Acad Sci, Space Res Inst, Graz, Austria
4.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Guoqiang,Zhang, Tielong,Wu, Mingyu,et al. Roles of electrons and ions in formation of the current in mirror-mode structures in the terrestrial plasma sheet: Magnetospheric Multiscale observations[J]. ANNALES GEOPHYSICAE,2020,38(2):309-318.
APA Wang, Guoqiang,Zhang, Tielong,Wu, Mingyu,Schmid, Daniel,Hao, Yufei,&Volwerk, Martin.(2020).Roles of electrons and ions in formation of the current in mirror-mode structures in the terrestrial plasma sheet: Magnetospheric Multiscale observations.ANNALES GEOPHYSICAE,38(2),309-318.
MLA Wang, Guoqiang,et al."Roles of electrons and ions in formation of the current in mirror-mode structures in the terrestrial plasma sheet: Magnetospheric Multiscale observations".ANNALES GEOPHYSICAE 38.2(2020):309-318.
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