A new interpretation of the heavy element abundances in metal-deficient stars

Details A new interpretation of the heavy element abundances in metal-deficient stars A new interpretation of the heavy element abundances in metal-deficient stars

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97..391t&link_type=abstract

Astronomy and Astrophysics, vol. 97, no. 2, Apr. 1981, p. 391-393.

Astronomy and Astrophysics

Astrophysics

158

Abundance, Galactic Evolution, Heavy Elements, Milky Way Galaxy, Nuclear Fusion, Stars, Barium, Europium, Iron, Yttrium

Scientific paper

Observations of element abundances in extremely metal-deficient stars are reviewed. Particular attention is given to trends in the abundances of the neutron capture products yttrium, barium, and europium. The variations in Y/Fe and Ba/Fe with Fe/H are found to defy simple explanation in the context of current theories: the conventional interpretation of these abundances as resulting from s-processing may be incorrect. It is suggested rather, that the observed trends follow in a natural and straightforward manner from the assumption that the Y and Ba in the most extreme metal-poor stars represent products of r-process nucleosynthesis. Implications for galactic evolution and nucleosynthesis are briefly discussed.

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