Thermal Particle Injection in Nonlinear Diffusive Shock Acceleration
天体物理学
2007-05-23 v1
摘要
Particle acceleration in collisionless astrophysical shocks, i.e., diffusive shock acceleration (DSA), is the most likely mechanism for producing cosmic rays, at least below 10^{15} eV. Despite the success of this theory, several key elements, including the injection of thermal particles, remains poorly understood. We investigate injection in strongly nonlinear shocks by comparing a semi-analytic model of DSA with a Monte Carlo model. These two models treat injection quite differently and we show, for a particular set of parameters, how these differences influence the overall acceleration efficiency and the shape of the broad-band distribution function.
引用
@article{arxiv.astro-ph/0507107,
title = {Thermal Particle Injection in Nonlinear Diffusive Shock Acceleration},
author = {Donald C. Ellison and Pasquale Blasi and Stefano Gabici},
journal= {arXiv preprint arXiv:astro-ph/0507107},
year = {2007}
}
备注
4 pages, 2 figures. To be published in the proc. 29th ICRC (Puna, India) 2005