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  4. 中国科学院地球与行星物理重点实验室
The magnetic field clock angle departure in the Venusian magnetosheath and its response to IMF rotation

文献类型：期刊论文

作者Xu, Qi5; Rong, Zhaojin1,5,6; Xu, Xiaojun2; Wei, Yong1,6; Li, Lei5; Zhang, Tielong3,4
刊名ASTRONOMY & ASTROPHYSICS
出版日期2023-09-20
卷号677页码:7
ISSN号0004-6361
关键词planets and satellites: individual: Venus planets and satellites: magnetic fields interplanetary medium magnetohydrodynamics (MHD)
DOI10.1051/0004-6361/202346989
英文摘要We investigate the characteristics of interplanetary magnetic field (IMF) draping in the Venusian magnetosheath using both Venus Express (VEX) observations and magnetohydrodynamics simulations. The distributions of magnetosheath field clock angle illustrate the nearly symmetric morphology of draped magnetic field with respect to the solar wind electric field, and the departure of the IMF clock angle is larger at closer distances. Based on VEX data, the sheath field clock angle departures are found to be <45 degrees for 90% of the instances under steady IMF and this parameter can respond almost immediately to the unsteady IMF. We suggest the magnetosheath field just slips around the planet without significant pileup or bending. Our time-dependent simulations indicate that the response time of sheath field to IMF variation is not more than 1 min and it depends on the involved regions of magnetosheath: the timescale in the inner part of magnetosheath adjacent to the induced magnetosphere is longer than that in the outer part. We find this timescale is controlled by the convection velocity in the magnetosheath, emphasizing the magnetohydrodynamic characteristics of the behavior of the sheath field. The finite magnetosheath field clock angle departure and its quick response to IMF variation suggest that the magnetic field clock angle measured within the Venusian magnetosheath can be used as a reasonable proxy for the upstream IMF clock angle.
WOS关键词INDUCED MAGNETOSPHERE ; MAGNETOTAIL ; EXPRESS ; PLASMA ; ASYMMETRIES ; MORPHOLOGY ; DAYSIDE ; IONS ; MARS
资助项目NSFC[2022A1515110383] ; Guangdong Basic and Applied Basic Research Foundation[0098/2022/A2] ; Guangdong Basic and Applied Basic Research Foundation[0003/2022/AFJ] ; Science and Technology Development Fund, Macau SAR ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:001081041600005
资助机构NSFC ; NSFC ; Guangdong Basic and Applied Basic Research Foundation ; Guangdong Basic and Applied Basic Research Foundation ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; NSFC ; NSFC ; Guangdong Basic and Applied Basic Research Foundation ; Guangdong Basic and Applied Basic Research Foundation ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; NSFC ; NSFC ; Guangdong Basic and Applied Basic Research Foundation ; Guangdong Basic and Applied Basic Research Foundation ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; NSFC ; NSFC ; Guangdong Basic and Applied Basic Research Foundation ; Guangdong Basic and Applied Basic Research Foundation ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Pandeng Program of National Space Science Center, Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/110706]  
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Xu, Qi
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
2.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Macau, Peoples R China
3.Harbin Inst Technol, Shenzhen 518057, Peoples R China
4.Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria
5.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Qi,Rong, Zhaojin,Xu, Xiaojun,et al. The magnetic field clock angle departure in the Venusian magnetosheath and its response to IMF rotation[J]. ASTRONOMY & ASTROPHYSICS,2023,677:7.
APA Xu, Qi,Rong, Zhaojin,Xu, Xiaojun,Wei, Yong,Li, Lei,&Zhang, Tielong.(2023).The magnetic field clock angle departure in the Venusian magnetosheath and its response to IMF rotation.ASTRONOMY & ASTROPHYSICS,677,7.
MLA Xu, Qi,et al."The magnetic field clock angle departure in the Venusian magnetosheath and its response to IMF rotation".ASTRONOMY & ASTROPHYSICS 677(2023):7.

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来源：地质与地球物理研究所

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