Spectral models of stellar populations resolved in chemical abundances

Abstract

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 [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

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

References in corpus (3)

• Age and metallicity gradients in early-type galaxies: A dwarf to giant sequence
• Stellar Population Models and Individual Element Abundances I: Sensitivity of Stellar Evolution Models
• Element abundances in the stars of the MILES spectral library: the Mg/Fe ratio

Cited by in corpus (3)

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• Abundance patterns in early-type galaxies: is there a 'knee' in the [Fe/H] vs. [alpha/Fe] relation?
• The complex globular cluster system of the S0 galaxy NGC 4382 in the outskirts of the Virgo Cluster