Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-06-23
Mon.Not.Roy.Astron.Soc.371:1251-1258,2006
Astronomy and Astrophysics
Astrophysics
submitted to MNRAS
Scientific paper
10.1111/j.1365-2966.2006.10739.x
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.
Amato Elena
Blasi Pasquale
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