Nonlinear Diffusive Shock Acceleration with Magnetic Field Amplification

Details Nonlinear Diffusive Shock Acceleration with Magnetic Field Amplification Nonlinear Diffusive Shock Acceleration with Magnetic Field Amplification

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.2108e&link_type=abstract

American Astronomical Society, HEAD meeting #9, #21.08

Astronomy and Astrophysics

Astronomy

Scientific paper

We introduce a model of nonlinear diffusive shock acceleration allowing for the generation of large-amplitude magnetic turbulence. The model is the first to include strong wave generation, efficient particle acceleration to relativistic energies in nonrelativistic shocks, and thermal particle injection in an internally self-consistent manner. We find that the upstream magnetic field can be amplified by large factors and show that this amplification depends strongly on the ambient field strength. We also show that in the nonlinear model large increases in B do not necessarily translate into a large increase in the maximum particle momentum a particular shock can produce. We apply our results to large magnetic fields believed to be produced by strong, cosmic-ray modified shocks in supernova remnants.

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