2011/12/29 by Zhonghui Fan, Siming Liu, Fan, Zhonghui +1
Physics and Astronomy · #Cosmology and Gravitation Theories #Gamma-ray bursts and supernovae #Solar and Space Plasma Dynamics #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.1112.6316
5 pages, 3 figures
arxiv created 2012/04/04 · arxiv updated 2012/04/05
Stochastic acceleration of charged particles due to their interactions with plasma waves may be responsible for producing superthermal particles in a variety of astrophysical systems. This process can be described as a diffusion process in the energy space with the Fokker-Planck equation. In this paper, a time-dependent numerical code is used to solve the reduced Fokker-Planck equation involving only time and energy variables with general forms of the diffusion coefficients. We also propose a self-similar model for particle acceleration in Sedov explosions and use the TeV SNR RX J1713.7-3946 as an example to demonstrate the model characteristics. Markov Chain Monte Carlo method is utilized to constrain model parameters with observations.