Chemical composition of globular cluster stars

Details Chemical composition of globular cluster stars Chemical composition of globular cluster stars

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247...56f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 1, July 1991, p. 56-63.

Astronomy and Astrophysics

Astrophysics

24

Chemical Evolution, Globular Clusters, Stellar Composition, Abundance, Giant Stars, Nuclear Astrophysics

Scientific paper

High resolution spectra of six giants belonging to galactic globular clusters have been obtained. Accurate abundance determinations of various elements have been obtained means of model atmosphere analysis. The O(39) index becomes extremely sensitive to a change in metallicity in objects with Fe/H greater than - 1, ruling out the linearity of the relation O(39) = f(Fe/H). the overabundance of alpha-elements found by previous authors is confirmed. The results are discussed in the light of models of self-enrichment of globular clusters.

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