Berlin 2005 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 6: Kosmische Strahlung und Heliosph

EP 6.2: Vortrag

Samstag, 5. März 2005, 14:45–15:00, TU BH349

A heliospheric hybrid model: hydrodynamic plasma flow and kinetic cosmic ray transport — •Klaus Scherer1 and Stefan Ferreira21Institut fr Astrophysik und Extraterrestrische Forschung der Universitẗ Bonn, Auf dem Hügel 71, D-53121 Bonn — 2Unit for Space Physics, School of Physics, North-West University, 2520 Potchefstroom, South Africa

On the interaction of the solar wind and the interstellar environment not only low energy charged particles, like solar wind and interstellar protons, as well as neutral gas, i.e. hydrogen, take part, but also the pressure of high energy particles, like galactic cosmic rays, influence the dynamic of the heliospheric structure. Moreover, an additional high energy component is create at the termination, the anomalous cosmic rays, which are accelerated pickup ions. The latter are build by charge exchange processes by the solar wind protons and the inflowing interstellar hydrogen. The plasma processes of these interaction have been described by a hydrodynamical five fluid model, where the high energetic particles have been also treated as a fluid. On the other hand, the transport of cosmic rays, as well as the acceleration of the anomalous component have been described by kinetic models, which at best have used the input of a plasma model. Now we have combined both models selfconsistently: the hydrodynamic description of the protons, hydrogen and pick up ions, together with the kinetic modeling of the galactic and anomalous cosmic rays. This allows us also to dynamically model the solar cycle influences on the propagation and acceleration of high energy particles in the heliosphere. We present first results.

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