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要旨

We discuss the impact of Inverse Compton losses on the shock acceleration of electrons which takes place in radiation dominated environments, i.e. in regions where the radiation energy density exceeds that of the magnetic field. We demonstrate, through accurate numerical calculations, that the inverse Compton losses of electrons, in the Klein-Nishina regime, lead to spectra of ultra-relativistic electrons which may significantly differ from classical Diffusive Shock Acceleration solutions. We discuss the implications of this effect on the hard X-ray synchrotron and gamma ray inverse Compton radiation, produced by shock accelerated electrons in young supernova remnants in the presence of large radiation fields (e.g. in the galactic center). We also discuss possible implications of our results for clusters of galaxies.