Abundances of neutron capture elements in Population II stars

Details Abundances of neutron capture elements in Population II stars Abundances of neutron capture elements in Population II stars

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...327..298g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 327, April 1, 1988, p. 298-320.

Physics

210

Abundance, Metallicity, Stellar Composition, Stellar Physics, Stellar Spectra, Absorption Cross Sections, Forbidden Transitions, Neutron Cross Sections, Stellar Atmospheres

Scientific paper

The authors have presented new heavy-element abundance results for 20 very metal poor stars. It has been demonstrated that the very heavy element abundances correlate only loosely with the Fe abundances: star-to-star scatter exists in excess of observational error, and signals the incomplete mixing of nucleosynthesis products in the galactic halo. Also it has been shown that a distinct r-process pattern is characteristic of the very heavy element abundance patterns. Finally, the onset of large amounts of galactic s-processing at a metallicity of ≈-2 has been identified and has led to the suggestion that the time scale of the buildup of Galactic metallicities to this value was ≡107yr.

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