Jena 2013 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 4: Poster Session
EP 4.34: Poster
Dienstag, 26. Februar 2013, 11:15–12:45, Poster OG
Ionization rates in the heliosheath and in astrosheaths — •Klaus Scherer1, Horst Fichtner1, Hans-Joerg Fahr2, Maciej Bzowski3, and Stefan Ferreira4 — 1Institut für Theoretische Physik IV, Ruhr-Universität Bochum, 44780 Bochum — 2Argelander Institut, Universität Bonn, 53121 Bonn — 3Polish Space Science Center, Warsaw — 4Centre for Space Research, North-West University, 2520 Potchefstroom, South Africa
In the heliosphere, especially in the inner heliosheath, mass-, momentum-, and energy loading induced by the ionization of neutral interstellar species plays an important and underestimated role. We discuss the importance of the charge exchange and electron impact processes for interstellar neutral hydrogen and helium and its implications for further modeling. We will show, that electron impact can in some regions of the heliosphere, particularly in the heliotail, more effective than charge exchange, and the ionization of neutral interstellar helium contributes about 20% to the mass- and momentum loading in the inner heliosheath.