Modeling Io's electrodynamic interaction with its torus: Comparsion with recent observations.

In this paper we present results of a three dimensional two-fluid plasma model that describes the electrodynamic interaction of Io with its plasma torus. Among other things, we discuss how a polar flyby is very well suited to determine whether Io has an internal magnetic field or not. From a polar flyby, we also expect insight into Io's electric current and Alfven Wing system. The degree of rotation of the Alfven wings allows to conclude properties of Io's atmosphere. We also look at aspects of the pickup processes, e.g. the total rate and their action on the plasma flow. Depending on the availability of data, we might also discuss how HST observations of the satellites UV emissions is related to the electrodynamic interaction and atmospheric properties.