On the stellar origin of the Ne-22 excess in cosmic rays

Abstract

view Abstract Citations (95) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the stellar origin of the Ne-22 excess in cosmic rays Casse, M. ; Paul, J. A. Abstract The Ne-22 excess at a cosmic ray source is considered in terms of an Ne-22-rich component injected and accelerated by carbon-rich Wolf-Rayet stars. The overabundance of Ne-22 relative to Ne-20 predicted at the surface of these stars is estimated to a factor of approximately 120 with regard to solar system abundances. The carbon-rich W-R contribution to the primary cosmic ray flux would have to be at maximum 1/60 in order to produce an Ne-22 excess of about 3 at the cosmic ray source. This component would be energized by strong stellar winds, producing quasi-standing shocks around the W-R stars. Publication: The Astrophysical Journal Pub Date: July 1982 DOI: 10.1086/160132 Bibcode: 1982ApJ...258..860C Keywords: Carbon Stars; Isotopic Enrichment; Neon Isotopes; Primary Cosmic Rays; Stellar Winds; Wolf-Rayet Stars; Abundance; Nuclear Fusion; Particle Flux Density; Stellar Atmospheres; Space Radiation full text sources ADS |