Maximal energies of the particles accelerated by the system of converging magnetohydrodynamic flows

16th Russian Youth Conference on Physics and Astronomy

物理学;天文学

Gladilin, P.E.^1 ; Bykov, A.M.^1 ; Osipov, S.M.^1

Ioffe Physical-Technical Institute, Russian Academy of Sciences, Saint-Petersburg, Russia^1

关键词: Energy ranges;    High-energy cosmic rays;    Magnetic field amplification;    Magneto-hydrodynamic flow;    Magnetohydrodynamic flows;    Non-linear model;    Particle acceleration;    Turbulent magnetic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/572/1/012003/pdf
DOI  :  10.1088/1742-6596/572/1/012003

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We have shown that maximal energies of the charged particles accelerated in the system of converging magnetohydrodynamic (MHD) flows can reach 1017eV. The scheme of magnetic field amplification (MFA) applied to the previous non-linear model of particle acceleration in the colliding shocks allowed to make proper estimates for the value of turbulent magnetic field. The efficiency of the particle acceleration on the energy range larger than the "knee" in the cosmic rays spectrum (1014-1015eV) makes the systems of colliding MHD flows important contributors to the overall high-energy cosmic rays population in the Galaxy.