Other
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..651w&link_type=abstract
Astrophysical Journal, Part 1, vol. 243, Jan. 15, 1981, p. 651-659.
Other
45
Abundance, Cosmic Rays, Isotopic Enrichment, Nuclear Fusion, Supernovae, Interstellar Matter, Magnesium Isotopes, Metallic Stars, Neon Isotopes, Stellar Mass Ejection
Scientific paper
Recent measurements of nonsolar isotopic patterns for the elements neon and (perhaps) magnesium in cosmic rays are interpreted within current models of stellar nucleosynthesis. One possible explanation is that the stars currently responsible for cosmic-ray synthesis in the Galaxy are typically super-metal-rich by a factor of 2-3. Other possibilities include the selective acceleration of certain zones or masses of supernovae or the enhancement of Ne-22 in the interstellar medium by mass loss from red giant stars and planetary nebulae. Measurements of critical isotopic ratios are suggested to aid in distinguishing among the various possibilities. Some of these explanations place significant constraints on the fraction of cosmic-ray nuclei that must be fresh supernova debris and the masses of the supernovae involved.
Weaver Thomas A.
Woosley Stan E.
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