Interaction of Enceladus's Water Plume with Kronian Magnetosphere via Hybrid Numerical Simulations

Details Interaction of Enceladus's Water Plume with Kronian Magnetosphere via Hybrid Numerical Simulations Interaction of Enceladus's Water Plume with Kronian Magnetosphere via Hybrid Numerical Simulations

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23c1639s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM23C-1639

Physics

Plasma Physics

[2152] Interplanetary Physics / Pickup Ions, [2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [6280] Planetary Sciences: Solar System Objects / Saturnian Satellites, [7800] Space Plasma Physics

Scientific paper

Cassini measurements have revealed a strong local effect of neutrals near Enceladus on the Kronian magnetosphere. Water-group molecules escaping from the surface of Enceladus create a large neutral plume of neutrals which are ionized through charge-exchange reactions with the co-rotating magnetospheric plasma. These freshly-produced pick-up ions slow down the magnetized plasma flow and act as an obstacle draping the magnetic field lines around it. We model the local plasma interactions with Enceladus and its neutral water plume and their effect on the Kronian magnetosphere by global 3D hybrid code numerical simulations. Our results are compared with in-situ measurements acquired during Cassini close flybys made in 2005 and 2008. In general, virtual Cassini flybys produced from our global model exhibit many qualitatively similar features to those measured in-situ by Cassini. Furthermore, we use several initial set-ups in order to better estimate the water plume properties and the mass-loading rate of fresh pick-up ions required to reproduce the magnetic field signatures as observed by the Cassini spacecraft.

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