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On the Origin of Complex Stellar Populations in Star Clusters

Published online by Cambridge University Press:  01 September 2007

J. Pflamm-Altenburg  and
P. Kroupa
J. Pflamm-Altenburg
Affiliation:
Argelander Institut für Astronomie (AIfA), Auf dem Hügel 71, D-53121 Bonn, Germany email: jpflamm@astro.uni-bonn.de, pavel@astro.uni-bonn.de Rhine Stellar Dynamics Network (RSDN)
P. Kroupa
Affiliation:
Argelander Institut für Astronomie (AIfA), Auf dem Hügel 71, D-53121 Bonn, Germany email: jpflamm@astro.uni-bonn.de, pavel@astro.uni-bonn.de Rhine Stellar Dynamics Network (RSDN)
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Abstract

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The existence of complex stellar populations in some star clusters challenges the understanding of star formation. E.g. the ONC or the sigma Orionis cluster host much older stars than the main bulk of the young stars. Massive star clusters (ω Cen, G1, M54) show metallicity spreads corresponding to different stellar populations with large age gaps. We show that (i) during star cluster formation field stars can be captured and (ii) very massive globular clusters can accrete gas from a long-term embedding inter stellar medium and restart star formation.

Keywords

stars: formationglobular clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S246: Dynamical Evolution of Dense Stellar Systems , September 2007 , pp. 71 - 72
Copyright
Copyright © International Astronomical Union 2008

References

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Pflamm-Altenburg, J., & Kroupa, P. 2007b, MNRAS 375, 855CrossRefGoogle Scholar