Energy spectrum and mass composition of primary cosmic rays around the ‘knee’ in the framework of the model with two types of sources

Abstract

Analysis of the experimental data on cosmic ray spectra in the framework of the proposed model with two types of sources leads to conclusion, that sources with particle generation spectral exponent p ∼ 2.85 give the major contribution to the all-particle spectrum in the energy range 10 5 – 10 7 GeV . ‘Fine structure’ of spectrum around the ‘knee’ may arise due to presence of nearby supernova type source, accelerating particles up to the energies ∼ 3 ⋅ 10 4 Z GeV , if the energy output of such source is ∼ 2 ⋅ 10 48 erg/source .