Statistics – Computation
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...201..177k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 201, no. 1, July 1988, p. 177-188.
Statistics
Computation
19
Computational Astrophysics, Particle Acceleration, Particle Collisions, Plasma Turbulence, Shock Waves, Transport Theory, Angular Distribution, Extragalactic Radio Sources, Interplanetary Medium, Magnetohydrodynamic Stability, Radiative Transfer
Scientific paper
A transport equation in which both pitch-angle diffusion and large-angle scattering are taken into account is used to investigate the first-order Fermi acceleration of particles at a shock. An analytic expression for the spectral index of particles is obtained for the case of isotropic large angle scattering for nonrelativistic shocks. The spectral index of the accelerated particles for nonrelativistic and relativistic shocks is analyzed as a function of the relative contribution of large-angle scattering. A unique feature in the angular distribution at the shock is found which provides a strong indication of the importance of large angle scattering in particle transport in turbulent magnetized plasmas.
Kirk John G.
Schneider Pat
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