On the viability of holistic cosmic-ray source models
Abstract
We consider the energy spectrum of cosmic-rays (CRs) from a purely phenomenological point of view and investigate the possibility that they all be produced by the same type of sources with a single power-law spectrum, in E^{-x}, from thermal to ultra-high energies. We show that the relative fluxes of the Galactic (GCR) and extra-galactic (EGCR) components are compatible with such a holistic model, provided that the index of the source spectrum be x \simeq 2.23\pm 0.07. This is compatible with the best-fit indices for both GCRs and EGCRs, assuming that their source composition is the same, which is indeed the case in a holistic model. It is also compatible with theoretical expectations for particle acceleration at relativistic shocks.
Keywords
Cite
@article{arxiv.astro-ph/0605046,
title = {On the viability of holistic cosmic-ray source models},
author = {J. Aublin and E. Parizot},
journal= {arXiv preprint arXiv:astro-ph/0605046},
year = {2009}
}
Comments
5 pages, 1 figure, Accepted for publication in Astronomy and Astrophysics