Non linear particle acceleration at non-relativistic shock waves in the presence of self-generated turbulence

Details Non linear particle acceleration at non-relativistic shock waves in the presence of self-generated turbulence Non linear particle acceleration at non-relativistic shock waves in the presence of self-generated turbulence

Publishing date

2006-06-23

URL

arxiv.org/abs/astro-ph/0606592v1

Journals

Mon.Not.Roy.Astron.Soc.371:1251-1258,2006

Science

Astronomy and Astrophysics

Field

Astrophysics

Additional info

submitted to MNRAS

Type

Scientific paper

Digital Object Identifier

10.1111/j.1365-2966.2006.10739.x

Abstract

Particle acceleration at astrophysical shocks may be very efficient if magnetic scattering is self-generated by the same particles. This nonlinear process adds to the nonlinear modification of the shock due to the dynamical reaction of the accelerated particles on the shock. Building on a previous general solution of the problem of particle acceleration with arbitrary diffusion coefficients (Amato & Blasi, 2005), we present here the first semi-analytical calculation of particle acceleration with both effects taken into account at the same time: charged particles are accelerated in the background of Alfven waves that they generate due to the streaming instability, and modify the dynamics of the plasma in the shock vicinity.

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