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High-redshift galaxies and the TP-AGB phase

Published online by Cambridge University Press:  01 December 2006

Claudia Maraston
Claudia Maraston*
Affiliation:
Oxford University, Denys Wilkinson Building, Keble Road, OX2 6RJ, Oxford, UK email: maraston@astro.ox.ac.uk
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Abstract

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I discuss how galaxy fundamental parameters that are derived by comparing observational data with stellar population models, depend on the adopted models. The emphasis is on the treatment of the Thermally-Pulsing Asymptotic Giant Branch (TP-AGB) stellar phase, that is a source of major discrepancy between the various model renditions. In particular, I show that ages and stellar masses of galaxies decrease when models including an empirically-calibrated TP-AGB phase are considered. Illustrative examples are provided for a wide redshift range. Constraints to galaxy formation models need revision on the light of these results.

Keywords

stars: AGB and post-AGBgalaxies: star clustersgalaxies: evolutiongalaxies: fundamental parametersgalaxies: high-redshift
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 147 - 151
Copyright
Copyright © International Astronomical Union 2007

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