Spectroscopy of giants in LMC clusters. I - Velocities, abundances, and the age-metallicity relation

Details Spectroscopy of giants in LMC clusters. I - Velocities, abundances, and the age-metallicity relation Spectroscopy of giants in LMC clusters. I - Velocities, abundances, and the age-metallicity relation

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101..515o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, Feb. 1991, p. 515-537, 761, 762.

Astronomy and Astrophysics

Astronomy

240

Abundance, Astronomical Spectroscopy, Giant Stars, Magellanic Clouds, Metallicity, Star Clusters, Color-Magnitude Diagram, Line Spectra, Open Clusters, Spectral Line Width, Stellar Evolution, Stellar Magnitude

Scientific paper

Velocities and equivalent widths are presented for a large sample of LMC clusters. The calcium abundance is found to be a sensitive abundance indicator over a very wide range of (Fe/H) between 0.0 and -2.2. The age-metallicity relation is constructed for the inner and outer parts of the LMC. This relationsip can be characterized by a simple one-zone enrichment model. The abundances for the inner and outer clusters at an age of 2 Gyr are nearly identical, so that little radial abundance gradient is evident in the cluster system.

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