Hybrid simulations of Enceladus' plasma interaction: a multi-instrument survey

Details Hybrid simulations of Enceladus' plasma interaction: a multi-instrument survey Hybrid simulations of Enceladus' plasma interaction: a multi-instrument survey

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm21b2018k&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM21B-2018

Physics

[2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [2753] Magnetospheric Physics / Numerical Modeling, [6280] Planetary Sciences: Solar System Objects / Saturnian Satellites

Scientific paper

We present an improved model of the interaction between Enceladus' plume and Saturn's magnetospheric plasma using the hybrid simulation code A.I.K.E.F. (adaptive ion kinetic electron fluid). For the first time, we combine measurements from multiple instruments of Cassini: we use a Monte-Carlo model to describe the neutral density in the plume in agreement with INMS data. The magnetospheric upstream density is obtained from RPWS measurements. We also compare the density and velocity profiles measured within the interaction region against our simulation results. Moreover, it has recently been shown that the influence of the electron-absorbing dust grains in the plume on the plasma structures and magnetic field perturbations including the Alfvén wings has to be taken into account [Simon et al., 2011, Kriegel et al., 2011]. Therefore, we now include a dust density obtained by modeling of CDA data. By comparing our simulations with magnetometer observations (MAG), we constrain the amount of electrons absorbed by the dust as well as the variability of the plume between the various Enceladus flybys. Furthermore, we discuss initial results for the recent encounters E14 - E16.

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