Power requirements for cosmic ray propagation models involving re-acceleration and a comment on second order Fermi acceleration theory
High Energy Astrophysical Phenomena
2014-06-02 v2
Abstract
We derive an analytic expression for the power transferred from interstellar turbulence to the Galactic cosmic rays in propagation models which include re-acceleration. This is used to estimate the power required in such models and the relative importance of the primary acceleration as against re-acceleration. The analysis provides a formal mathematical justification for Fermi's heuristic account of second order acceleration in his classic 1949 paper.
Keywords
Cite
@article{arxiv.1404.2104,
title = {Power requirements for cosmic ray propagation models involving re-acceleration and a comment on second order Fermi acceleration theory},
author = {Andrew Thornbury and Luke O'C. Drury},
journal= {arXiv preprint arXiv:1404.2104},
year = {2014}
}
Comments
3 pages, submitted to MNRAS. some additions as requested by the referee