Tobias Hein

Universität Würzburg


Diffusive and convective cosmic ray transport in elliptical galaxies (pdf)

The best accepted model for the origin of ultrahigh energy cosmic rays is acceleration in shock fronts due to Fermi processes. Hence the main sources are supernovae, gamma ray bursts or active galaxies,espacially active galactic nuclei. Because of the GZK-effect very nearby AGN are the most probable candidates for UHECR sources. One of these nearby AGN is the giant elliptical galaxy M87. Since particle acceleration in a jet is located within an active galaxy, the high energetic nuclei undergo physical transport processes before they escape out. Therefore a model for cosmic ray transport in elliptical galaxies is inevitable. In my talk I describe the solution of the cosmic ray transport in elliptical galaxies. A special attention is payed for the spatial transport of charged nuclei. In addition, the solution of the momentum equation will be shown to explain general properties of this model. Furthermore some aspects of this model used for M87 are explained.





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