Advanced MHD modeling of Enceladus' interaction with the magnetosphere of Saturn

Details Advanced MHD modeling of Enceladus' interaction with the magnetosphere of Saturn Advanced MHD modeling of Enceladus' interaction with the magnetosphere of Saturn

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p41a1252b&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #P41A-1252

Physics

2732 Magnetosphere Interactions With Satellites And Rings, 6005 Atmospheres (1060), 6030 Magnetic Fields And Magnetism, 6280 Saturnian Satellites

Scientific paper

In this paper we present the latest results of the three-dimensional MHD multi-fluid model of the interaction between Enceladus and the magnetosphere of Saturn. This model is based on the numerical code CASIM3D initially developed to simulate cometary atmospheres. The CASIM3D model uses a three-fluid approach where ions, neutrals, and electrons are considered as separate interacting fluids. The kinetic equations relative to these three fluids are solved using an adaptive Cartesian grid that is refined or relaxed as needed. The multi-fluid approach we chose leads to a more accurate representation of the atmosphere of Enceladus since the dynamics of ions, neutrals and electrons are computed separately and in a self-consistent way. In the current simulation we investigate more precisely the structure of Enceladus' tenuous atmosphere in the light of the recent data gathered by the Cassini spacecraft during its flybys of this icy moon. The model takes into account a neutral plume emission from the southern polar terrain as an explanation of the density peaks detected by the Ion Neutral Mass spectrometer (INMS) and the Dust analyzer (CDA) instruments.

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