Cosmic Rays: Studying the Origin
Jacek Szabelski
Abstract
Investigations of the origin of cosmic rays are presented. Different methods are discussed: studies of cosmic gamma rays of energy from 30 MeV to about 1015 eV (since photons point to their places of origin), studies of the mass composition of cosmic rays (because it reflects source morphology), and studies of cosmic rays with energy above 1019 eV (for these are the highest energies observed in nature).
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