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Wolfendale, Arnold; Erlykin, Anatoly
Astroparticle physics, 01/2014, Letnik: 53Journal Article
► Gamma-ray astronomy gives evidence of the galactic origin of CR at GeV energies. ► CR energy spectrum indicates the non-uniform space–time distribution of CR sources. ► Galactic supernova remnants (SNRs) are the most likely source of CR up to PeV energies. ► High density of SNR in the inner galaxy creates flatter energy spectrum than locally. The case is made for most cosmic rays having come from galactic sources. ‘Structure’, i.e. a lack of smoothness in the energy spectrum, is apparent, strengthening the view that most cosmic rays come from discrete sources, supernova remnants being most likely.
