Wuppertal 2015 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 9: Astrophysik

EP 9.2: Vortrag

Donnerstag, 12. März 2015, 15:00–15:15, G.10.02 (HS 9)

Cosmic rays in astrosphere — •Klaus Scherer^1,2, August van der Schyff³, Domink Bomans⁴, Stefan Ferreira³, Horst Fichtner^1,1, Jens Kleimann¹, DuToit Strauss⁴, Kerstin Weis³, Tobias Wiengarten¹, and Thomas Wodzinski⁴ — ¹Institut für Theoretische Physik IV: Weltraum- und Astrophysik, Ruhr-Universität Bochum, Germany — ²Research Department, Plasmas with Complex Interactions, Ruhr-Universität Bochum, Germany — ³Center for Space Research, North-West University, 2520 Potchefstroom, South Africa — ⁴Astronomische Institute, Ruhr-Universität Bochum, Germany

We model the cosmic ray ux in a stellar wind cavity of a O or B type star using a transport model based on stochastic differential equations. The required parameters, for example the coffiecients of the dffusion tensor, are determined from an underlying hydrodynamical model with a kinematic describtion of the magnetic field. We discuss the transport in the astrosphere of lambda Cephei with varying parameters for the transport co- efficients. We will argue that large stellar wind cavities can act as sinks for the galactic cosmci ray flux.