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Diffusive Shock Acceleration by Multiple Shock Fronts with Differing Properties

Published online by Cambridge University Press:  25 April 2016

M. H. Pope  and
D. B. Melrose
M. H. Pope
Affiliation:
Research Centre for Theoretical Astrophysics, and Sir Frank Packer Department of Theoretical Physics, School of Physics, University of Sydney, NSW 2006
D. B. Melrose
Affiliation:
Research Centre for Theoretical Astrophysics, and Sir Frank Packer Department of Theoretical Physics, School of Physics, University of Sydney, NSW 2006
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Abstract

The effect of diffusive shock acceleration on a distribution of particles is explored for multiple shocks, taking into account adiabatic expansion between the shocks. Specifically, the spectral index is calculated numerically for two cases: a sequence of identical shocks, and a sequence of pairs of shocks with alternating shock strength. How these two cases evolve to the asymptotic limit is examined, and it is shown that the evolution of the paired-shock case can be described by a sequence of identical shocks with shock strength equal to the mean of the two.

Type
High Energy Astrophysics
Information
Publications of the Astronomical Society of Australia , Volume 11 , Issue 2 , August 1994 , pp. 175 - 179
Copyright
Copyright © Astronomical Society of Australia 1994

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