Berlin 2005 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 15: Extrasolare Planeten

EP 15.3: Vortrag

Mittwoch, 9. März 2005, 09:15–09:30, TU BH349

Plasma Interactions in Extrasolar Planetary Systems — •Sabine Preusse1, Andreas Kopp1,2, Jörg Büchner1, and Uwe Motschmann31Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau — 2Astronomisches Institut, Ruhr-Universität Bochum — 3Institut für Theoretische Physik, TU Braunschweig

One of the most important discoveries during the last decade are extrasolar planets. A striking feature of many extrasolar planetary systems is the close vicinity of the planets to their stars. This implies interaction features between star and planet which may be considerably different to those known from the solar system. One outstanding example is the ”hot spot” which moves with the orbital period of the companion planet in the chromosphere of HD 179949. In order to gain insight into the processes involved and to possibly make predictions for future observations, we aim at modelling some kind of magnetic interaction between star and planet. For this we assume that the stellar wind plays an important role in such extreme planetary systems. In order to take it into account, we model the stellar wind environment with the magnetohydrodynamic description of Weber & Davis. The results of these computations are then used as an input model for 3D simulations of the stellar wind interaction with possible planetary magnetospheres in the framework of resistive magnetohydrodynamics.

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