Comparison of Different Methods for Nonlinear Diffusive Shock Acceleration

Details Comparison of Different Methods for Nonlinear Diffusive Shock Acceleration Comparison of Different Methods for Nonlinear Diffusive Shock Acceleration

2010-05-12

arxiv.org/abs/1005.2127v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

26 pages, 4 figures, published version (references updated)

Scientific paper

10.1111/j.1365-2966.2010.17013.x

We provide a both qualitative and quantitative comparison among different approaches aimed to solve the problem of non-linear diffusive acceleration of particles at shocks. In particular, we show that state-of-the-art models (numerical, Monte Carlo and semi-analytical), even if based on different physical assumptions and implementations, for typical environmental parameters lead to very consistent results in terms of shock hydrodynamics, cosmic ray spectrum and also escaping flux spectrum and anisotropy. Strong points and limits of each approach are also discussed, as a function of the problem one wants to study.

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