Fermi acceleration in astrophysical jets |
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Authors: | Frank M Rieger Valentí Bosch-Ramon Peter Duffy |
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Institution: | (1) UCD School of Mathematical Sciences, University College Dublin, Belfield, Dublin 4, Ireland;(2) Departament d’Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain |
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Abstract: | We consider the acceleration of energetic particles by Fermi processes (i.e., diffusive shock acceleration, second order Fermi
acceleration, and gradual shear acceleration) in relativistic astrophysical jets, with particular attention given to recent
progress in the field of viscous shear acceleration. We analyze the associated acceleration timescales and the resulting particle
distributions, and discuss the relevance of these processes for the acceleration of charged particles in the jets of AGN,
GRBs and microquasars, showing that multi-component powerlaw-type particle distributions are likely to occur. |
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Keywords: | Particle acceleration Jets Microquasars Active galaxies Gamma-ray bursts |
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