Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..229r&link_type=abstract
Astrophysical Journal, Part 1, vol. 231, July 1, 1979, p. 229-235.
Astronomy and Astrophysics
Astrophysics
18
Abundance, Carbonaceous Chondrites, Chronology, Meteoritic Composition, Nuclear Fusion, Stellar Evolution, B Stars, Boron 10, Cosmic Rays, Milky Way Galaxy, O Stars, Protostars, Radioactive Isotopes, Supernova Remnants, Meteorites, Allende Meteorite, Isotopic Anomalies, Sun, Nucleosynthesis, Abundance, Aluminum, Cosmic Rays, Flux, Nuclei, Explosion, Boron, Uranium, Galaxies, Evolution, Supernova, Stars, Thorium, Samarium, Plutonium
Scientific paper
Recent data on isotopic anomalies of various elements in meteorites are interpreted in the picture of the birth of the sun in a stellar OB association. The following points are suggested by this analysis. The standard picture of stellar nucleosynthesis by an exponentially decreasing stellar activity throughout the galactic life remains tenable. Addition of newly generated atoms takes place in spiral arms. The last addition of solar-system material is due to several massive supernovae (larger than 15 solar masses) exploding within the protosolar OB association. The nucleosynthetic yield of these stars is high in O-16 and Al-26 but very low for r- and p-process elements (C burning is probably not the main generator of Al-26). The record of the cosmic-ray fluxes in the protosolar OB associations is perhaps written in hypothetical meteoritic boron isotopic anomalies.
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