Bremen 2017 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 3: Astrophysik
EP 3.4: Vortrag
Montag, 13. März 2017, 17:15–17:30, GW2 B2880
An improved analytical model of the local interstellar magnetic field: The extension to compressibility — •Jens Kleimann1, Christian Röken2, and Horst Fichtner1 — 1Theoretische Physik IV, Ruhr-Universität Bochum, Germany — 2Fakultät für Mathematik, Universität Regensburg, Germany
The analytical magnetohydrodynamic (MHD) model for the local interstellar magnetic field in the vicinity of the heliopause by Röken et al. (2015) is an exact solution to the induction equation of ideal MHD for an interstellar magnetic field being passively advected in a Rankine-type heliospheric velocity field. I will first review basic properties of this model, and then present a recent generalization from incompressible to compressible flow. Both the exact solution and realistic approximations to the resulting density structure will be discussed. The usefulness of this still analytical solution as an approximation to self-consistent magnetic field configurations obtained numerically from the full MHD equations is illustrated by quantitative comparisons.