HR: 0800h
AN: P21B-0550    [Abstracts]
TI: A Self-consistent Approach to Io's Local Interaction With the Torus: a Hybrid Code Coupled to a Multi-species Chemistry Model.
AU: * Dols, V
EM: dols@lasp.colorado.edu
AF: University of Colorado LASP, UCB392 Duane-Physics D117, Boulder, CO 80309-0392, United States
AU: Delamere, P
EM: Peter.Delamere@lasp.colorado.edu
AF: University of Colorado LASP, UCB392 Duane-Physics D117, Boulder, CO 80309-0392, United States
AU: Bagenal, F
EM: Fran.Bagenal@lasp.colorado.edu
AF: University of Colorado LASP, UCB392 Duane-Physics D117, Boulder, CO 80309-0392, United States
AB: Io's local interaction with the plasma torus has been extensively studied with a variety of complementary approaches: MHD (Linker et al., 1998; Combi et al.,1998), 2-fluid modeling (Saur et al., 1999) and multi-species chemistry (Dols et al., submitted to JGR). We present a self-consistent, multi-species chemistry model of this interaction. We compute the ionization and charge-exchange rates in Io's corona (~6 R_Io) with a physical chemistry model that includes S, O, SO and SO₂ and use these results as input into a hybrid code to compute a self-consistent plasma flow around Io. We iterate several times between the chemistry and the hybrid models to reach a stationary solution. We will present preliminary results showing the development of an asymmetry in the flow and its effect on the plasma production, ion mass production rates and pick-up current. The results will be compared to the Galileo observation on its flyby in Io's wake.
DE: 6218 Jovian satellites
DE: 6219 Io
SC: Planetary Sciences [P]
MN: 2007 Fall Meeting