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题名: A three-dimensional high Mach number asymmetric magnetopause model from global MHD simulation
作者: Liu, Z. -Q.1; Lu, J. Y.2; Wang, C.1; Kabin, K.3; Zhao, J. S.4; Wang Min(王敏)2; Han, J. P.1, 5; Wang, J. Y.1, 5; Zhao, M. X.6
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期: 2015-07-01
卷号: 120, 期号:7, 页码:5645-5666
关键词: MHD ; Magnetopause ; Cusp
学科分类: 天文和天体物理
DOI: 10.1002/2014JA020961
文章类型: Article
英文摘要: The numerical results from a physics-based global magnetohydrodynamic (MHD) model are used to examine the effect of the interplanetary magnetic field (IMF), solar wind dynamic pressure, and dipole tilt angle on the size and shape of the magnetopause. The subsolar magnetopause is identified using the plasma velocity and density, the cusps are identified using the thermal pressure, and the whole shape of the magnetopause is determined with the three-dimensional streamlines traced through the simulation domain. The magnetopause surface obtained from the simulations is fitted with a three-dimensional surface function controlled by ten configuration parameters, which provide a description of the subsolar magnetopause, the cusp geometry, the flaring angle, the azimuthal asymmetry, the north-south asymmetry, and the twisting angle of the magnetopause. Effects of the IMF, solar wind dynamic pressure, and dipole tilt angle on the configuration parameters are analyzed and fitted by relatively simple functions. It is found that the solar wind dynamic pressure mainly affects the magnetopause size; the IMF mainly controls the magnetopause flaring angle, azimuthal asymmetry, and twisting angle; and the dipole tilt angle mainly affects the magnetopause north-south asymmetry and the cusp geometry. The model is validated by comparing with available empirical models and observational results, and it is demonstrated that the new model can describe the magnetopause for typical solar wind conditions.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: INTERPLANETARY MAGNETIC-FIELD ; NEAR-EARTH MAGNETOTAIL ; SOLAR-WIND CONTROL ; ENERGY-TRANSFER ; GEOMAGNETIC FIELD ; EMPIRICAL-MODEL ; IMF DEPENDENCE ; BOW SHOCK ; SHAPE ; SIZE
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000360381400030
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14836
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing, Peoples R China
2.Nanjing Univ Informat Sci & Technol, Coll Math & Stat, Inst Space Weather, Nanjing, Jiangsu, Peoples R China
3.Royal Mil Coll Canada, Dept Phys, Kingston, ON, Canada
4.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
6.China Meteorol Adm, Natl Ctr Space Weather, Beijing, Peoples R China
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