Abstract
The whole cosmic ray spectrum measured from GeV to 100 EeV energies could result from the same Fermi acceleration process at work in the supernova remnants of our Galaxy for energies from GeV to PeV, in extragalactic objects such as Active Galactic Nuclei, RadioGalaxies and Gamma Ray Bursts beyond PeV energies. Moreover the galactic or extragalactic sources of synchrotron radiation contain a population of ultrarelativistic electrons that have a powerlaw distribution similar to the cosmic ray population and that are plausibly explained also by the Fermi process. These lectures are designed to explain the 1st and 2nd order Fermi processes in the nonrelativistic regime, to give the theoretical tools necessary to complete the task on the remaining important open questions. Then the goal of the astrophysical explanation of the UHE Cosmic Rays seems to require the extension of Fermi process in the relativistic regime together with cosmic ray scattering off strong magnetic turbulence. This new development of the theory, which is not yet stabilised, will be introduced as well. The performance of the various cosmic accelerators are also presented.
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Pelletier, G. (2001). Fermi Acceleration of Astroparticles. In: Lemoine, M., Sigl, G. (eds) Physics and Astrophysics of Ultra-High-Energy Cosmic Rays. Lecture Notes in Physics, vol 576. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45615-5_4
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DOI: https://doi.org/10.1007/3-540-45615-5_4
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