Oxygen and iron in Omega Centauri giants

Details Oxygen and iron in Omega Centauri giants Oxygen and iron in Omega Centauri giants

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249l..13b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 2, Sept. 1991, p. L13-L15. Research supported by Kennilworth Fund and

Astronomy and Astrophysics

Astrophysics

23

Centaurus Constellation, Globular Clusters, Iron, Oxygen Spectra, Red Giant Stars, Abundance, Metallicity, Milky Way Galaxy

Scientific paper

Oxygen and iron abundances are derived for 18 red giants in Omega Cen, a globular cluster with a substantial spread in metallicity. Over the range in metallicity from -1.0 to -2.0 dex the (O/Fe) value remains sensibly constant near (O/Fe) = +0.4. The relationship of (O/Fe) and (Fe/H) appears to be the same in Omega Cen as in the halo of the Galaxy. This similarity is discussed in connection with the retention of supernova ejecta by Omega Cen as (Fe/H) increased from -2.0 to -1.0 and (O/H) increased from -1.6 to -0.6.

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