Bonn 2020 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 11: Astrophysics I

EP 11.7: Talk

Thursday, April 2, 2020, 18:15–18:30, H-HS VIII

On the simulation of bow shock perturbations — •Lennart R. Baalmann — Ruhr-Universität Bochum

Small inhomogeneities in an otherwise homogeneous interstellar medium, so called Tiny-Scale Atomic Structures, create perturbations of an astrosphere's bow shock, resulting in a variety of observable bow shock features. We simulate this scenario by first computing a numerical single-fluid 3D MHD astrosphere until it reaches stationarity and then start such an inhomogeneity in front of the bow shock. While the inhomogeneity must have a constrained range of parameters (density, pressure, velocity, magnetic field) in order to be both physical and stable enough to reach the bow shock, its size, shape and position/angle of impact at the bow shock is varied in a wide range of the parameter set. Here, the first results will be presented.