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Observations of multiple populations in star clusters

Published online by Cambridge University Press:  01 October 2008

Giampaolo Piotto
Giampaolo Piotto*
Affiliation:
Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio, 3, I-35122, Padova, Italy email: giampaolo.piotto@unipd.it
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Abstract

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An increasing number of photometric observations of multiple stellar populations in Galactic globular clusters is seriously challenging the paradigm of GCs hosting single, simple stellar populations. These multiple populations manifest themselves in a split of different evolutionary sequences as observed in the cluster color-magnitude diagrams. Multiple stellar populations have been identified in Galactic and Magellanic Cloud clusters. In this paper we will summarize the observational scenario.

Keywords

globular clustersstars: horizontal-branchstellar populationstechniques: photometricastrometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S258: The Ages of Stars , October 2008 , pp. 233 - 244
Copyright
Copyright © International Astronomical Union 2009

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