Relativistic, cosmic-ray modified shocks

Details Relativistic, cosmic-ray modified shocks Relativistic, cosmic-ray modified shocks

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..264..294k&link_type=abstract

In: Particle acceleration in cosmic plasmas; Proceedings of the Workshop, Bartol Research Inst., Newark, DE, Dec. 4-6, 1991 (A93

Physics

1

Cosmic Rays, Particle Acceleration, Relativistic Particles, Shock Wave Interaction, Self Consistent Fields, Shock Fronts

Scientific paper

Relativistic cosmic-ray modified shocks are examined using the theory of first-order Fermi acceleration at relativistic shock fronts. The efficiency of the mechanism depends on the backreaction of the test particles on the fluid. The investigation of stationary solutions which include this effect can in principle provide a means of estimating the efficiency. In the nonrelativistic case, stationary solutions turn out not to be relevant indicators of efficiency, because realistic acceleration time scales are too slow. Arguments which indicate that this problem does not necessarily apply to shocks which move relativistically are presented. Highly relativistic shocks are found to generally satisfy the self-consistency test s is greater than 4.

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