Particle acceleration by ultrarelativistic shocks: theory and simulations
A. AchterbergAstronomical Institute, Utrecht University, PO Box 80 000, 3508 TA Utrecht, the NetherlandsY. A. GallantAstronomical Institute, Utrecht University, PO Box 80 000, 3508 TA Utrecht, the NetherlandsJ. G. KirkMax-Planck Institut für Kernphysik, Postfach 10 39 80, 69029 Heidelberg, GermanyA. W. GuthmannMax-Planck Institut für Kernphysik, Postfach 10 39 80, 69029 Heidelberg, Germany
2001en
ABI
Annotatsiya
We consider the acceleration of charged particles near ultrarelativistic shocks, with Lorentz factor G s @ 1. We present simulations of the acceleration process and compare these with results from semi-analytical calculations. We show that the spectrum that results from acceleration near ultrarelativistic shocks is a power law, NE/ E 2s , with a nearly universal value s < 2:2-2:3 for the slope of this power law.
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