Carbon abundances in the LMC globular cluster NGC 1818.

Details Carbon abundances in the LMC globular cluster NGC 1818. Carbon abundances in the LMC globular cluster NGC 1818.

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...290..753m&link_type=abstract

Astronomy and Astrophysics 290, 753-761 (1994)

Astronomy and Astrophysics

Astrophysics

7

Magellanic Clouds, Galaxies: Abundances, Galaxies: Star Clusters, Globular Clusters: Ngc 1818 (Lmc)

Scientific paper

From medium-resolution spectra (~5A) of 5 red supergiants in the globular cluster NGC 1818 of the Large Magellanic Cloud, we have derived their metallicities through a comparison to a grid of 380 synthetic spectra (Cayrel et al. 1991). The carbon abundances were then derived by computing synthetic spectra in the G-band region. A mean metallicity for the 5 stars is [Fe/H]=~-0.9. The mean carbon abundance is ɛ(C)=7.9 for 4 stars, and a lower value of ɛ(C)=7.2 for the star B26, for which a convective mixing, or exchange of material with a companion has possibly occurred.

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