Bremen 2017 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 3: Astrophysik

EP 3.5: Vortrag

Montag, 13. März 2017, 17:30–17:45, GW2 B2880

Linear Disturbances in the Local Interstellar Medium: The Plasma-Gas Interaction in the Two-Fluid Approximation — •Lukas Westrich — Institut für theoretische Physik IV, Ruhr-Universität Bochum, Deutschland

In this scientific presentation, linear disturbances in the local interstellar medium (LISM) are examined. Background is a scenario which proposes a local density enhancement in the LISM as the cause of the IBEX ribbon. Therefore must be probed whether such an increase in the LISM can exist. For this purpose, the plasma-gas mixture of LISMs is described with a two-fluid model, in order to subsequently apply the linear perturbation theory. In addition, is examined with this model, what processes take place inside the heliosphere with these density waves as precisely as possible to get an idea of how realistic this scenario of the local density enhancement is. The result is that such a density wave can propagate without damping after its creation along the interstellar magnetic field and is damped only in the heliosphere. The damping within the termination shock is stronger than outside.