Stellar origin of the /sup 22/Ne excess in cosmic rays

Journal Article · Thu Jul 15 04:00:00 EDT 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160132· OSTI ID:6575564

Casse, M; Paul, J A

The /sup 22/Ne excess at the cosmic-ray source is discussed in terms of a /sup 22/Ne-rich component injected and accelerated by carbon-rich Wolf-Rayet stars. The overabundance of /sup 22/Ne relative to /sup 20/Ne predicted at the surface of these stars is estimated to a factor approx.120 with respect to solar system abundances. In order to give rise to a /sup 22/Ne excess of about 3 at the cosmic-ray sources as inferred from observations, the carbon-rich Wolf-Rayet contribution to the primary cosmic-ray flux is to be at maximum 1/60. This component would be energized by strong stellar winds producing quasi-standing shocks around the Wolf-Rayet stars.

• Research Organization: Section d'Astrophysique, Centre d'Etudes Nuclearies de Saclay, France
• OSTI ID: 6575564
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 258:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ATMOSPHERES
COSMIC NUCLEI
COSMIC RADIATION
COSMIC RAY SOURCES
EVEN-EVEN NUCLEI
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MAIN SEQUENCE STARS
NEON 22
NEON ISOTOPES
NUCLEI
NUCLEOSYNTHESIS
RADIATIONS
STABLE ISOTOPES
STARS
STELLAR ATMOSPHERES
STELLAR WINDS
WOLF-RAYET STARS