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Diffusive Shock Acceleration by Multiple Shocks

Published online by Cambridge University Press:  25 April 2016

D.B. Melrose  and
M.H. Pope
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
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
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Abstract

Diffusive shock acceleration produces a power law momentum distribution f(p)α p−b, with b ≥ 4 for a single shock, and b = 4 for a single strong shock. It has been shown that the distribution for acceleration at a sequence of identical shocks is flatter, approaching f(p)α p−3 below a high energy knee, for an arbitrarily large number of shocks. We show how this flatter distribution arises and discuss the range of momenta over which it extends after a finite number of shocks.

Type
High Energy Astrophysics
Information
Publications of the Astronomical Society of Australia , Volume 10 , Issue 3 , 1993 , pp. 222 - 224
Copyright
Copyright © Astronomical Society of Australia 1993

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