Nonlocal relativistic diffusion (NoRD) model of cosmic ray propagation

International Conference on Particle Physics and Astrophysics

物理学;天文学

Uchaikin, V.V.^1 ; Sibatov, R.T.^1

Department of Theoretical Physics, Ulyanovsk State University, 42 Leo Tolstoy street, Ulyanovsk, Russia^1

关键词: Background spectra;    Cosmic ray propagation;    Fractional calculus;    Interstellar mediums;    Knee problems;    Numerical results;    Observation data;    Physical interpretation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012029/pdf
DOI  :  10.1088/1742-6596/798/1/012029

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The problem of physical interpretation of the nonlocal relativistic diffusion (NoRD model) for cosmic ray transport in the Galaxy is discussed. The model accounts for the turbulent character of the interstellar medium and the relativistic principle of the speed limitation. Involving fractional calculus and non-Gaussian Lévy statistics yields numerical results compatible with observation data. A special attention is paid to the knee problem. The relativistic speed limit requirement steepens theoretical background spectrum at certain energies, and the position of the break, its sharpness and slopes of asymptotes depend on Dα(E) and α.