Spectral models of stellar populations resolved in chemical abundances

Details Spectral models of stellar populations resolved in chemical abundances Spectral models of stellar populations resolved in chemical abundances

2011-12-02

arxiv.org/abs/1112.0513v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Contributed talk, IAU Symp. 284, The Spectral Energy Distribution of Galaxies, Preston (UK), September 2011, eds. R. J. Tuffs

Scientific paper

We present model spectra of stellar populations with variable chemical composition. We derived the [alpha/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 [\alpha/Fe]. We used a semi-empirical approach that combines the observed spectra with synthetic stellar spectra. We tested the models using them to derive [\alpha/Fe] in galaxies and star clusters using full spectrum fitting. The present models are available from http://ulyss.univ-lyon1.fr

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