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The puzzling origin and evolution of stellar populations in ω Centauri

Published online by Cambridge University Press:  01 December 2006

A. Sollima ,
F. R. Ferraro ,
M. Bellazzini  and
E. Pancino
A. Sollima*
Affiliation:
Dipartimento di Astronomia, Università di Bologna via Ranzani 1, 40127-I Bologna, Italy
F. R. Ferraro
Affiliation:
Dipartimento di Astronomia, Università di Bologna via Ranzani 1, 40127-I Bologna, Italy
M. Bellazzini
Affiliation:
INAF Osservatorio Astronomico di Bologna via Ranzani 1, 40127-I Bologna, Italy
E. Pancino
Affiliation:
INAF Osservatorio Astronomico di Bologna via Ranzani 1, 40127-I Bologna, Italy
*
† email: antonio.sollima@bo.astro.it
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Abstract

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On the basis of large photometric and spectroscopic datasets, we investigated the general properties of the different sub-populations of ω Centauri in different regions of the color-magnitude diagram. In particular, we analysed the morphology, the structure and the chemical properties of the stellar populations of the system in variuos evolutionary stages. Such a large observational effort allowed us to constraint the different hypotesis on the origin and chemical evolution of this peculiar stellar system.

Keywords

methods: data analysistechniques: photometrictechniques: spectroscopicstars: abundancesstars: evolutionstars: Population IIglobular clusters: ω Centauri

References

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