Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..257o&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, July 15, 1988, p. 257-264.
Astronomy and Astrophysics
Astronomy
35
Magnetic Field Configurations, Particle Acceleration, Particle Interactions, Relativistic Particles, Shock Wave Propagation, Astronomical Models, Energetic Particles, Shock Wave Interaction, Supernova Remnants
Scientific paper
Based on the assumption that the magnetic moments of the energetic particles are conserved, the author derives formulae for the acceleration rate of energetic (relativistic) particles during their interaction with a non-relativistic shock propagating into a medium having a magnetic field that is oblique to the propagation direction. A shock wave with the magnetic field oriented oblique to the shock normal provides conditions for more rapid acceleration than the (quasi-) parallel shock; the characteristic time-scale for acceleration can be even a few orders of magnitude shorter in the case of a nearly perpendicular shock. However, the assumption that the amplitude of the magnetic field perturbations is small must be fulfilled for the used approach to be valid.
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