Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..203..317s&link_type=abstract
IN: Particle astrophysics - The NASA cosmic ray program for the 1990s and beyond (A92-20526 06-93). New York, American Institute
Astronomy and Astrophysics
Astrophysics
Abundance, Concentration (Composition), Cosmic Rays, Nuclear Astrophysics, Wolf-Rayet Stars, Astronomical Models, Nuclear Fusion, Particle Acceleration, Photosphere, Stellar Atmospheres, Stellar Winds, Supernova Remnants
Scientific paper
Theories are developed that improve the derivation of the cosmic-ray source abundances for energies below 10 to the 12th eV/u and enable calculations of source composition at energies between 10 exp 12 and 10 exp 15 eV/u. A comparison of calculated and observationally deduced cosmic-ray source abundances for energies between 10 exp 8 and 10 exp 12 eV/u is presented. It is shown that the composition below 10 exp 12 eV/u differes from that of the general stellar photosphere by (1) the suppression of elements with a large FIP (greater than 10 eV), (2) the depletion of light nuclei (Z not greater than 10), and (3) a large contribution of WC stars to C-12, O-16, and Ne-22.
Shapiro Marjorie
Silberberg Rein
Tsao C. H.
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