SMuK 2023 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 2: Exoplanets and Astrobiology

EP 2.2: Vortrag

Montag, 20. März 2023, 16:45–17:00, ZEU/0160

Habitability inside astrospheres — •Klaus Scherer¹, Konstantin Herbst², Dominik J. Bomans³, N. Eugene Engelbrecht⁴, Stefan .E.S. Ferrerira⁴, Lennart Baalmann⁵, Frederiic Effenberger¹, and Jen Kleimann¹ — ¹Institut für Theoretische Physik IV, Ruhr-Universität Bochum, Germany — ²Institut für Experimentelle and Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Germany — ³Astronomisches Institut, Ruhr-Universität Bochum, Germany — ⁴Centre for Space Research, North-West University, Potchefstroom, South Africa — ⁵Institute for Particle and Astroparticle Physics, ETH Zürich, Switzerland

The habitable planets around a host star are not only influenced by the stellar wind or flare activity, but are also embedded in the interstellar environment, which can also influence these planets and their atmospheres. We will show that, for certain classes of astrospheres, the inflow of the neutrals on the top of an exoplanetary atmosphere can be large. This is done by modelling the interaction between the stellar wind and the interstellar medium using a two fluid MHD model. Moreover, such an 3D MHD simulation will also allow us to study the modulation of galactic cosmic rays in 3D, incorporating a turbulence transport model, so that the diffusion coefficients and the drift velocities can be modelled as far as possible from first principles. We will also discuss the latter point.