The induced magnetosphere of Mars. Fields, forces, currents - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Communication Dans Un Congrès Année : 2019

The induced magnetosphere of Mars. Fields, forces, currents

Résumé

The absence of the global magnetic field at Mars leads to the direct interaction of solar wind with its atmosphere and ionosphere and formation of the draped induced magnetosphere. Although the crustal magnetic field significantly complicates the field topology near the planet adding components typical for the magnetized planets it is possible to highlight the main features of the induced magnetosphere by using the MAVEN data for the northern hemisphere in which the role of crustal magnetization is less significant. It is shown that draping of the magnetic field lines occurs very asymmetrical with respect to the direction of the motional electric field. Wrapping of the field lines starting in the E+ hemisphere propagates to the E- hemisphere where the cross-flow component of the draped IMF changes sign in the broadened area with formation of the loops with the closed field lines and plasma vortices. Another important feature in addition to the classical tailward stretching of the field lines is appearance of a draping in the direction opposite to the direction of the motional electric field. Due to the force experienced by the ionosphere in this direction the ionosphere shifts and becomes very asymmetrical. Fluxes of escaping ions in the tail turn out to be also very asymmetrical. Forces and electric currents responsible for all these features will be discussed.
Fichier non déposé

Dates et versions

insu-04531003 , version 1 (03-04-2024)

Identifiants

Citer

E. Dubinin, Ronan Modolo, M. Fraenz, M. Pätzold, L. Chai, et al.. The induced magnetosphere of Mars. Fields, forces, currents. American Geophysical Union, Fall Meeting 2019, Dec 2019, San Francisco, United States. pp.abstract #SM33D-3238. ⟨insu-04531003⟩
2 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More