2005/09/22 by E. Amato, Elena Amato, Pasquale Blasi +1 · 8 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Laser-Plasma Interactions and Diagnostics #astro-ph
paper · pdf · doi:10.1111/j.1745-3933.2005.00110.x
published as Mon.Not.Roy.Astron.Soc.Lett.364:L76-L80,2005 · 11 pages, 3 figures; accepted for publication in MNRAS Letters
arxiv created 2005/09/22 · openalex publication_date 2005/10/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Diffusive acceleration at collisionless shock waves remains one of the most promising acceleration mechanisms for the description of the origin of cosmic rays at all energies. A crucial ingredient to be taken into account is the reaction of accelerated particles on the shock, which in turn determines the efficiency of the process. Here we propose a semi-analytical kinetic method that allows us to calculate the shock modification induced by accelerated particles together with the efficiency for particle acceleration and the spectra of accelerated particles. The shock modification is calculated for arbitrary environment parameters (Mach number, maximum momentum, density) and for arbitrary diffusion properties of the medium. Several dependences of the diffusion coefficient on particle momentum and location are considered to assess the accuracy of the method.