Acceleration time scale in an ultrarelativistic shock

Details Acceleration time scale in an ultrarelativistic shock Acceleration time scale in an ultrarelativistic shock

2000-05-09

arxiv.org/abs/astro-ph/0005207v2

Mon.Not.Roy.Astron.Soc. 315 (2000) L37

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.2000.03681.x

The acceleration mechanism at ultrarelativistic shocks is investigated using the Monte Carlo simulations. We apply a method of discrete small amplitude particle momentum scattering to reproduce highly anisotropic conditions at the shock and carefully describe the acceleration mechanism. The obtained acceleration times equal $1.0 r_{g}/c$ if the spectral index reach the value of 2.2, independent of physical conditions in the shock. Some other parameters of the acceleration process are also provided.

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