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Testing evolutionary synthesis models: Empirical feedback to model makers

Published online by Cambridge University Press:  13 April 2010

Roberto Cid Fernandes  and
Rosa M. González Delgado
Roberto Cid Fernandes
Affiliation:
Departamento de Física-CFM, Universidade Federal de Santa Catarina, Florianópolis, Brasil
Rosa M. González Delgado
Affiliation:
Instituto de Astrofísica de Andalucía-CSIC, Granada, Spain
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Abstract

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Integrated spectra of star clusters are the best test beds for predictions of evolutionary synthesis models. We present spectral fits of star cluster using a variety of recent models. All models allow good spectral fits, but newer ones tend to be better. Ages estimated through spectral fits are not strongly model dependent, but metallicities can differ a lot from one model to another. For some clusters, multi-population fits suggest a combination of very old (1010 yr) and very young (< 108) populations, an artifact of the lack of old and blue stars in the models.

Keywords

galaxies: star clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S262: Stellar Populations – Planning for the Next Decade , August 2009 , pp. 69 - 72
Copyright
Copyright © International Astronomical Union 2010

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