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Metal abundances of Magellanic Cloud clusters

Published online by Cambridge University Press:  19 July 2016

D. Geisler ,
A. McWilliam ,
N. Suntzeff ,
M. Mateo ,
J. Graham  and
L. Pasquini
D. Geisler
Affiliation:
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
A. McWilliam
Affiliation:
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
N. Suntzeff
Affiliation:
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
M. Mateo
Affiliation:
Observatories of the Carnegie Inst. of Washington
J. Graham
Affiliation:
Observatories of the Carnegie Inst. of Washington
L. Pasquini
Affiliation:
European Southern Observatory

Abstract

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We have obtained Washington CCD photometry with the CTIO 4m and 1.5m for ˜50 intermediate-to-old age star clusters in the Clouds. The data extend to near or below the main sequence and provide excellent photometry for the giants, from which precise (internal errors <0.1 dex) mean cluster abundances can be determined. We present data for several of the clusters and discuss the results. Intermediate resolution spectra have also been obtained for some 16 clusters with the CTIO 4m ARGUS multiple-object fibre-fed spectrograph. Finally, we have also obtained high dispersion (R˜20,000) échelle spectra for several of the brighter giants in a small sample of Large Magellanic Cloud (LMC) clusters. Detailed elemental abundances derived from these spectra will be presented. These data will help refine our knowledge of the age-metallicity relation in the Clouds.

Type
Stellar Evolution
Information
Symposium - International Astronomical Union , Volume 148: The Magellanic Clouds , 1991 , pp. 341 - 342
Copyright
Copyright © Kluwer 1991 

References

Geisler, D. (1987), A. J. 93, 1081.CrossRefGoogle Scholar
Mateo, M., Schechter, P. (1990), Proceedings of the First ESO Workshop on Data Analysis , in press.Google Scholar
Schommer, R.A., Olszewski, E., Suntzeff, N. B. (1990), this volume.Google Scholar