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Metallicities of intermediate-age and old star clusters in the Large Magellanic Cloud

Published online by Cambridge University Press:  18 January 2010

Arūnas Kučinskas ,
Vidas Dobrovolskas ,
Algimantas Černiauskas ,
Roma Lazauskaitė  and
Toshihiko Tanabé
Arūnas Kučinskas
Affiliation:
Vilnius University, Institute of Theoretical Physics and Astronomy, Vilnius, Lithuania Astronomical Observatory of Vilnius University, Lithuania
Vidas Dobrovolskas
Affiliation:
Astronomical Observatory of Vilnius University, Lithuania
Algimantas Černiauskas
Affiliation:
Vilnius University, Institute of Theoretical Physics and Astronomy, Vilnius, Lithuania Department of Physics, Vilnius Pedagogical University, Lithuania
Roma Lazauskaitė
Affiliation:
Department of Physics, Vilnius Pedagogical University, Lithuania
Toshihiko Tanabé
Affiliation:
Institute of Astronomy, University of Tokyo, Japan
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Abstract

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We derive photometric metallicities for 56 intermediate-age and old star clusters in the Large Magellanic Cloud from the slopes of their red-giant branches in near-infrared color–magnitude diagrams (CMDs). The cluster sample covers the LMC bar and disk to a distance of ~2 kpc from the LMC center. The derived cluster metallicity distribution spans a range of [Fe/H] = +0.0 . . . 1.4 and is similar to the metallicity distribution of field stars. We find that the average cluster metallicities in certain fields of the LMC bar and disk may be different, but there seems to be no compelling evidence for a global cluster metallicity gradient in the LMC.

Keywords

Magellanic Cloudsgalaxies: star clustersgalaxies: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S266: Star clusters: basic galactic building blocks throughout time and space , August 2009 , pp. 446
Copyright
Copyright © International Astronomical Union 2010