Berlin 2005 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 12: Astrophysik

EP 12.5: Vortrag

Dienstag, 8. März 2005, 15:15–15:30, TU BH349

Spectral properties of interstellar turbulence — •Ralf Kissmann1, Jens Kleimann1, Horst Fichtner1, Reinhard Schlickeiser1, and Rainer Grauer21Lehrstuhl für Theoretische Physik IV, Ruhr-Universität Bochum, 44780 Bochum — 2Lehrstuhl für Theoretische Physik I, Ruhr-Universität Bochum, 44780 Bochum

The energy inserted into the interstellar matter is mainly stored as turbulent kinetic energy. Actual heating of the ISM is then a consequence of the different wave-damping processes for different wave types the turbulence consists of. E. g. one has to gain knowledge about the contribution of compressional or incompressional modes, and possible anisotropies in the spectral form to obtain a clearer picture on the transfer rate into heat.

Apart from that the spectral properties of the interstellar turbulence are also of great interest in connection to the propagation of cosmic ray particles.

Since there are, so far, only indirect observational means to gain information on the situation in interstellar space, one has to rely on the capacity of numerical simulations in order to get any additional information on this complex system. Here we present our progress with such MHD simulations regarding the evolution of interstellar turbulence and show first results for the spectral transport in this environment.

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