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Multiple stellar populations in massive LMC star clusters

Published online by Cambridge University Press:  01 July 2008

A. D. Mackey ,
P. Broby Nielsen ,
A. M. N. Ferguson  and
J. C. Richardson
A. D. Mackey
Affiliation:
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK, email: dmy@roe.ac.uk
P. Broby Nielsen
Affiliation:
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK, email: dmy@roe.ac.uk
A. M. N. Ferguson
Affiliation:
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK, email: dmy@roe.ac.uk
J. C. Richardson
Affiliation:
Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK, email: dmy@roe.ac.uk
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Abstract

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The recent discovery of multiple stellar populations in massive Galactic globular clusters poses a serious challenge for models of star cluster formation and evolution. A new angle on this problem is being provided by rich intermediate-age clusters in the Magellanic Clouds. In this contribution we describe the discovery of three such LMC clusters with peculiar main-sequence turn-off morphologies. The simplest interpretation of our observations is that each of these three clusters is comprised of two or more stellar populations spanning an age interval of ~300 Myr. Surprisingly, such features may not be unusual in this type of cluster.

Keywords

globular clusters: generalgalaxies: individual (LMC)Magellanic Cloudsgalaxies: star clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S256: The Magellanic System: Stars, Gas, and Galaxies , July 2008 , pp. 305 - 310
Copyright
Copyright © International Astronomical Union 2009

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