2007/03/21 by Giovanni Morlino, G. Morlino, Pasquale Blasi +2 · 1 citation
Physics and Astronomy · #Acceleration #Astrophysics and Cosmic Phenomena #Atomic physics #Classical mechanics #Computational physics #Electron #Energy exchange #Ionosphere and magnetosphere dynamics #Magnetic field #Mechanics #Nuclear physics #Particle (ecology) #Particle acceleration #Physics #Plasma #Quantum mechanics #Scattering #Shock (circulatory) #Solar and Space Plasma Dynamics #Turbulence #astro-ph
paper · pdf · doi:10.1086/518395
21 pages, 8 figs
arxiv created 2007/03/21 · openalex publication_date 2007/06/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We determine the spectrum of particles accelerated at shocks with arbitrary speed and arbitrary scattering properties for different choices of the equation of state of the downstream plasma. More specifically, we consider the effect of energy exchange between the electron and proton thermal components downstream and the effect of generation of a turbulent magnetic field in the downstream plasma. The slope of the spectrum turns out to be appreciably affected by all these phenomena, especially in the Newtonian and transrelativistic regimes, while in the ultrarelativistic limit the universal spectrum s ≈ 4.3 seems to be a very solid prediction.