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- Title
Geomagnetopause Position and Shape Dependence on Solar Wind Plasma and IMF Parameters: Analytic Model Comparison with Observations and 3-D MHD Runs.
- Authors
Verigin, M. I.; Kotova, G. A.; Bezrukikh, V. V.; Foullon, Claire; Malandraki, Olga E.
- Abstract
It is generally accepted to use the solar wind ram pressure ρ V 2 and the IMF B z component for empirical description of the geo-magnetopause position and shape. A specific feature of the present paper is not to use the solar wind ρ V 2 but the thermal P th and magnetic field P mag pressures adjacent to the magnetopause for proper modelling. These pressures are deduced from the results of 3-D MHD runs and analytic solutions for post bow shock MHD flow in Lagrangian variables. The magnetopause shape variation due to B z component changes the so called 'doubling factor' f d , which can be analytically deduced from a Tsyganenko magnetospheric field ellipsoidal model. Including all the above effects in our analytical model leads to a good description of 'rapid' magnetopause approach to the Earth for southward IMF and to its 'stagnant' behaviour with the increase of northward IMF component.
- Publication
Proceedings of the International Astronomical Union, 2017, Vol 13, Issue S335, p121
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921317010420