@article {23989,
	title = {Ca II Triplet Spectroscopy of Giants in Small Magellanic Cloud Star Clusters: Abundances, Velocities, and the Age-Metallicity Relation},
	volume = {115},
	year = {1998},
	month = {1998/05/1},
	pages = {1934 - 1945},
	abstract = {We have obtained spectra at the Ca ii triplet of individual red giants in seven Small Magellanic Cloud (SMC) star clusters whose ages range from ~4 to 12 Gyr. The spectra have been used to determine mean abundances for six of the star clusters to a typical precision of 0.12 dex. When combined with existing data for other objects, the resulting SMC age-metallicity relation is generally consistent with that for a simple model of chemical evolution, scaled to the present-day SMC mean abundance and gas mass fraction. Two of the clusters (Lindsay 113 and NGC 339), however, have abundances that are ~0.5 dex lower than that expected from the mean age-metallicity relation. It is suggested that the formation of these clusters, which have ages of ~5 Gyr, may have involved the infall of unenriched gas, perhaps from the Magellanic Stream. The spectra also yield radial velocities for the seven clusters. The resulting velocity dispersion is 16 +/- 4 km s^-1, consistent with those of the SMC planetary nebula and carbon star populations.},
	keywords = {Astrophysics, GALAXIES: ABUNDANCES, GALAXIES: INDIVIDUAL: NAME: SMALL MAGELLANIC CLOUD, GALAXIES: KINEMATICS AND DYNAMICS, GALAXIES: MAGELLANIC CLOUDS, galaxies: star clusters},
	isbn = {0004-6256},
	url = {https://ui.adsabs.harvard.edu/abs/1998AJ....115.1934D},
	author = {Da Costa, G. S. and Hatzidimitriou, D.}
}
