Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...597l..81d&link_type=abstract
The Astrophysical Journal, Volume 597, Issue 1, pp. L81-L84.
Astronomy and Astrophysics
Astronomy
25
Acceleration Of Particles, Magnetohydrodynamics: Mhd, Turbulence
Scientific paper
We perform numerical experiments of test particle acceleration on turbulent magnetic and electric fields obtained from pseudospectral direct numerical solutions of the compressible three-dimensional MHD equations. We find consistent acceleration of the particles to many times the plasma characteristic (Alfvén) speed and extended power laws in the density distribution of energies. Scaling laws of maximum and mean energy of particles with the nominal gyrofrequency and the MHD electric field are observed and a simple estimate is presented.
Brown Richard M.
Dmitruk Pablo
Matthaeus William H.
Seenu N.
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