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1 - Metal-rich stars and stellar populations: a brief history and new results

Published online by Cambridge University Press:  02 December 2009

R. M. Rich
Affiliation:
Department of Physics and Astronomy, UCLA, Los Angeles CA 90095-1547, USA
Garik Israelian
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife
Georges Meynet
Affiliation:
Geneva Observatory
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Summary

The subject of metal-rich stars has been controversial for over 40 years, and I review some of the major developments in the subject area during that period, emphasizing those papers that set the subject on its presentday course. Metals emerge in the Universe at very high redshift, and galaxies with roughly Solar metallicity are documented even at redshift 3. In the local Universe, disks and bulges are often metal-rich, but metal-rich stars can also be found in distant halo populations, likely ejected into those environments by merger events. The Galactic bulge has a mean abundance of slightly subsolar but contains stars as metal-rich as [Fe/H] ∼+0.5; these stars have a complicated enhancement of light elements.

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Publisher: Cambridge University Press
Print publication year: 2008

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