Bohm diffusion and cosmic-ray-modified shocks

Details Bohm diffusion and cosmic-ray-modified shocks Bohm diffusion and cosmic-ray-modified shocks

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...90..981d&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 90, no. 2, p. 981-983

Statistics

Computation

2

Cosmic Rays, Mathematical Models, Particle Acceleration, Particle Diffusion, Shock Wave Propagation, Wave-Particle Interactions, Computational Grids, High Energy Interactions, Magnetohydrodynamic Turbulence, Phase-Space Integral, Space-Time Functions, Wave Scattering

Scientific paper

A numerical solution to the problem of self-consistent diffusive shock acceleration is presented. The cosmic rays are scattered, accelerated and exert a back-reaction on the gas through their interaction with turbulence frozen into the local fluid frame. Using a grid with a hierarchical spacetime structure the physically interesting limit of Bohm diffusion (K varies as pv), which introduces a wide range of diffusion lengthscales and acceleration timescales, can be studied. Some implications for modified shocks and particle acceleration are presented.

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