http://arxiv.org/abs/1608.04227
We make quantitative estimates of the power supplied to the Galactic cosmic ray population by second-order Fermi acceleration, or as it is usually termed in cosmic ray propagation studies, reacceleration. Using recent results on the local interstellar spectrum from the Voyager missions we show that for parameter values, in particular the Alfv\’en speed, typically used in progagation codes such as \Galprop\ the power contributed by reacceleration is significant and of order 50\% of the total Galactic cosmic ray power. The implications for the damping of interstellar turbulence are briefly considered.
L. Drury and A. Strong
Tue, 16 Aug 16
14/57
Comments: Submitted to A&A
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