Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...272..756o&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 272, Sept. 15, 1983, p. 756-764.
Astronomy and Astrophysics
Astrophysics
62
Cosmic Rays, Galactic Radiation, Heao 3, Dependence, Radiation Measurement, Wave Propagation
Scientific paper
The authors reexamine the energy dependence of the mean escape length of cosmic rays from the Galaxy in the light of recent measurements of cosmic-ray abundances from the Danish-French experiment on HEAO 3. Comparing these data with results of propagation calculations, they find that the energy dependence is steeper than previously thought. This result coupled with the absence of structure in the proton spectrum to 1014 eV, implies that 1 GeV per nucleon cosmic rays do not diffuse more than a few hundred parsecs from their sources during their 107 year lifetime. The authors discuss implications for the shape of the cosmic ray path length distribution at short path lengths and on the galactic wind model for the loss of cosmic rays from the Galaxy by convection.
Ormes Johnathan F.
Protheroe Raymond J.
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