Max Planck Institute for Dynamics and Self-Organization -- Department for Nonlinear Dynamics and Network Dynamics Group
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BFNT/BCCN Sonderseminar

Tuesday, 27.09.2011 13:30 s.t.

Cosmic ray driven winds in galaxies

by Maximilian Uhlig
from Max-Planck-Institut für Astrophysik, Garching

Contact person: Theo Geisel


Am Faßberg 17, Seminarraum 0.77/0.79


Large-scale outflows (winds) are believed to play an important role in the life of galaxies. Since they affect the galactic gas content, winds will directly influence the star formation rate and contribute to enriching the surrounding medium with metals and energy. In the standard picture of wind formation, thermal pressure of supernova-heated gas gives rise to outflows. However, since cooling is very effective in the dense galactic regions, it seems unlikely that thermal pressure alone could explain this phenomenon. High energetic particles (cosmic rays) that are accelerated in supernova shocks might also drive an outflow via their electromagnetic interactions with the gas. In the talk we review the results of our numerical experiments on cosmic ray driven winds achieved so far.

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