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Blue stragglers in star clusters and the conventional SSP models

Published online by Cambridge University Press:  18 January 2010

Yu Xin ,
Richard de Grijs ,
Licai Deng  and
Pavel Kroupa
Yu Xin
Affiliation:
Argelander Institute for Astronomy, University of Bonn, Bonn, Germany
Richard de Grijs
Affiliation:
Department of Physics and Astronomy, University of Sheffield, Sheffield, UK National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
Licai Deng
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
Pavel Kroupa
Affiliation:
Argelander Institute for Astronomy, University of Bonn, Bonn, Germany
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Abstract

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The presence of blue straggler stars (BSs) as secure members of star clusters poses a major challenge to the conventional picture of simple stellar population (SSP) models. The models are based on the stellar evolution theory of single stars, while the major formation mechanisms of BSs are all correlated with stellar interactions. Based on a sufficient working sample including 100 Galactic open clusters, one Galactic globular cluster, and seven Magellanic Cloud star clusters, we discuss the modifications of the properties of broad-band colors and Lick indices of the standard SSP models due to BS populations.

Keywords

blue stragglersgalaxies: star clusters
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. 556
Copyright
Copyright © International Astronomical Union 2010