Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...391..719m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 391, no. 2, June 1, 1992, p. 719-735.
Physics
137
Abundance, Galactic Evolution, Heavy Elements, Nuclear Capture, Nuclear Fusion, Supernovae, Branching (Physics), Chemical Evolution, Massive Stars
Scientific paper
Observed heavy-element abundance ratios in the halo and the disk are compared with one-zone models of galactic chemical evolution. These comparisons provide useful insight into the kinds of stellar environments responsible for r- and s-process nucleosynthesis. The growth of r-process material appears to be associated with the ejection rate of material from massive stars. Low-mass Type II supernovae are slightly favored if the r-process is primary. The growth of s-process material is consistent with production in intermediate-mass stars. The yields for both the s- and the r-process, however, appear to require a neutron source which does not depend upon initial metallicity.
Bazan Grant
Cowan John J.
Mathews Grant J.
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