Origin of Cosmic Rays

Introduction §1. Primary Cosmic Rays Near the Earth <l type="letter"> a) Chemical composition b) Energy spectrum </l> §2. Radio-Astronomical Data <l type="letter"> a) Magnetic bremsstrahlung (synchrotron radiation) b) Certain results of observations and their interpretation (structure of the Galaxy, discrete sources) </l> §3. Lifetime of Cosmic Rays and Character of Their Motion in the Galaxy and the Metagalaxy <l type="letter"> a) Nuclear lifetime of cosmic rays b) The role of cosmic rays produced at an earlier stage of evolution of the Galaxy c) Character of motion and escape of cosmic rays from the Galaxy d) Cosmic rays of metagalactic origin e) Origin of electronic component of cosmic rays </l> §4. Sources of Cosmic Rays. Mechanisms of Acceleration and Chemical Composition of Cosmic Rays <l type="letter"> a) Sources of cosmic rays b) Mechanisms of acceleration and energy spectrum of cosmic rays. Possibility of preferred acceleration of heavy nuclei c) Transformation of chemical composition of cosmic rays in the interstellar medium d) Discussion of chemical composition of cosmic rays </l> Concluding Remarks References