Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm51b1784c&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM51B-1784
Physics
[2753] Magnetospheric Physics / Numerical Modeling
Scientific paper
In our MHD model of Jupiter's magnetosphere, the magnetosphere-ionosphere coupling is consistently modelled by introducing ion-neutral collisions in an extended ionosphere in the MHD equations. Furthermore, the implementation of a production source term in the equations mimics the mass-loading of the Io torus. Consequently, two very important parameters for the Jovian magnetosphere, namely the ionospheric Pedersen conductance and the Io torus mass-loading, can be controlled in our model. In order to quantify the accuracy of our simulations, we compare the azimuthal velocity profiles with the semi-analytical models of Hill (1979, 2001) and Saur et al. (2004) when these two parameters vary. Our simulation results are in very good agreement with these models. In addition, the parallel currents in the ionosphere are used as a proxy parameter to study the aurorae in our simulations. We observe that the shape of the main oval is strongly affected by the location of both, the co-rotation break-down and the magnetopause.
Chané Emmanuel
Poedts Stefaan
Saur Joachim
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