The influence of energy losses on the acceleration of cosmic-ray particles at a shock front

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cosmic Rays, Energy Dissipation, Interstellar Matter, Particle Acceleration, Shock Fronts, Charged Particles, Diffusion Coefficient, Distribution Functions, Particle Collisions, Power Spectra, Synchrotron Radiation

Scientific paper

The regular acceleration of charged particles at a shock front is analyzed, with allowance for collisional losses, adiabatic cooling, and synchrotron radiation. Criteria for injectionless acceleration are established, and threshold injection momenta are determined for moderate acceleration rates. Particle spectra are obtained for the entire energy range. The number of particles that might be accelerated at shock fronts in the envelopes of galactic supernovae is estimated as a function of the diffusion coefficient.

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