ACCELERATION OF COSMIC RAYS AT COSMIC SHOCKS
نویسندگان
چکیده
منابع مشابه
Acceleration of Cosmic Rays at Cosmic Shocks
Nonthermal particles can be produced due to incomplete thermalization at collisionless shocks and further accelerated to very high energies via diffusive shock acceleration. In a previous study we explored the cosmic ray (CR) acceleration at cosmic shocks through numerical simulations of CR modified, quasi-parallel shocks in 1D plane-parallel geometry with the physical parameters relevant for t...
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In the common model supernova shock-acceleration of cosmic rays there are two open questions: 1. where does the high energy cosmic rays below the knee (10 − 10 Gev) come from, and 2. are cosmic ray accelerated only at their origin or contineuosly during their residence in the Galaxy. We show that 105 eV light nuclei are probably accelerted by associations of supernovae. The ratio of the spectra...
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We present the model of cosmic rays acceleration at ultrarelativistic subshocks and confront it with the observations of gamma-ray bursts (GRBs) and blazars. We investigate cosmic rays acceleration in shocks with Lorentz factors (γ) in the range 3 40. We show that fluctuations of the magnetic field downstream of the shock do not play an important role in the acceleration process. Results of num...
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We have calculated the evolution of cosmic ray (CR) modified astrophysical shocks for a wide range of shock Mach numbers and shock speeds through numerical simulations of diffusive shock acceleration (DSA) in 1D quasi-parallel plane shocks. The simulations include thermal leakage injection of seed CRs, as well as pre-existing, upstream CR populations. Bohm-like diffusion is assumed. We model sh...
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ژورنال
عنوان ژورنال: Journal of The Korean Astronomical Society
سال: 2003
ISSN: 1225-4614
DOI: 10.5303/jkas.2003.36.1.001