Cosmic-ray transport and acceleration

Abstract

view Abstract Citations (32) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Cosmic-Ray Transport and Acceleration Schlickeiser, Reinhard Abstract We review the transport and acceleration of cosmic rays concentrating on the origin of galactic cosmic rays. Quasi-linear theory for the acceleration rates and propagation parameters of charged test particles combined with the plasma wave viewpoint of modeling weak cosmic electromagnetic turbulence provides a qualitatively and quantitatively correct description of key observations. Incoporating finite frequency effects, dispersion, and damping of the plasma waves are essential in overcoming classical discrepancies with observations as the Kfit - Kql discrepancy of solar particle events. We show that the diffusion-convection transport equation in its general form contains spatial convection and diffusion terms as well as momentum convection and diffusion terms. In particular, the latter momentum diffusion term plays a decisive role in the acceleration of cosmic rays at super-Alfvenic supernova shock fronts, and in the acceleration of ultra-high-energy cosmic rays by distributed acceleration in our own galaxy. Publication: The Astrophysical Journal Supplement Series Pub Date: February 1994 DOI: 10.1086/191927 Bibcode: 1994ApJS...90..929S Keywords: Galactic Cosmic Rays; Mathematical Models; Particle Acceleration; Transport Theory; Wave-Particle Interactions; Electromagnetic Fields; Fokker-Planck Equation; Fourier Transformation; Magnetohydrodynamic Turbulence; Shock Fronts; Wave Scattering; Astrophysics; ACCELERATION OF PARTICLES; CONVECTION; DIFFUSION; ISM: COSMIC RAYS; SHOCK WAVES full text sources ADS |