Cosmic particle acceleration in astrophysical shear flows

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Shear flows are ubiquitous phenomena in astrophysical environments. In the present contribution the stochastic acceleration of energetic charged particles by Fermi-type processes in relativistic shear flows is considered. We review recent theoretical progress in the field of viscous shear acceleration and discuss its significance with application to collimated AGN and expanding GRB flows. In particular, it is shown that shear acceleration in relativistic jets can lead to an efficient production of UHE cosmic ray particles.

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