Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..72..261g&link_type=abstract
Astrophysics and Space Science, vol. 72, no. 2, Oct. 1980, p. 261-270.
Astronomy and Astrophysics
Astrophysics
1
Astrophysics, Magnetohydrodynamic Turbulence, Particle Acceleration, Relativistic Particles, Supernova Remnants, Charged Particles, Energy Dissipation, Larmor Radius, Particle Energy, Shock Waves
Scientific paper
The acceleration of relativistic particles is examined during their intersection with hydrodynamic shock fronts in the presence of randomly located large magnetic fields. The Larmor radius of these particles exceeds the width of the shock front in many astronomical objects so that a change in the adiabatic invariant exists which results in the increased particle energy when it crosses the front. It was shown that the adiabatic portion of the energy change will be compensated by its reverse change in the weaker regions of the magnetic field; the acceleration mechanism is more effective than the Fermi theory. Finally, it is proved that the rates at which the particle gains energy are almost the same for large or small particles.
Gurevich L. E.
Rumiantsev A. A.
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