Propagation of cosmic rays and new evidence for distributed acceleration

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cosmic Rays, Extragalactic Radio Sources, Galactic Radiation, Particle Acceleration, Shock Wave Propagation, Supernovae, Celestial Bodies, Radiation Sources, Radio Sources (Astronomy), Velocity Distribution

Scientific paper

The origin and propagation of cosmic rays in terms of conventional and supplementary newer assumptions were explored. Cosmic rays are considered to be accelerated by supernoava shock waves and to traverse clouds in the source region. After rigidity-dependent escape from these clouds into interstellar space, cosmic rays are further accelerated by the weakened shocks of old supernova remnants and then pass through additional material. The distributed acceleration hypothesis is discussed with emphasis on recent data on the abundances of cosmic-ray isotopes of N above 1 GeV/u and of He near 6 GeV/u.

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