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Spectral models of stellar populations resolved in chemical abundances

Published online by Cambridge University Press:  17 August 2012

Philippe Prugniel  and
Mina Koleva
Philippe Prugniel
Affiliation:
Université de Lyon, Lyon I, CRAL-Observatoire de Lyon UMR5574, CNRS, France email: philippe.prugniel@univ-lyon1.fr
Mina Koleva
Affiliation:
Université de Lyon, Lyon I, CRAL-Observatoire de Lyon UMR5574, CNRS, France email: philippe.prugniel@univ-lyon1.fr Sterrenkundig Observatorium, Ghent University, Belgium
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Abstract

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We present model spectra of stellar populations with variable chemical composition. We derived the [α/Fe] abundance ratio of the stars of the most important libraries (ELODIE, CFLIB and MILES) using full spectrum fitting and we generated PEGASE.HR models resolved in [α/Fe]. We used a semi-empirical approach that combines the observed spectra with synthetic stellar spectra. We tested the models using them to derive [α/Fe] in galaxies and star clusters using full spectrum fitting. The present models are available from http://ulyss.univ-lyon1.fr

Keywords

galaxies: stellar contentgalaxies: abundancesstars: fundamental parameters

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