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A new approach to derive [α/Fe] for integrated stellar populations

Published online by Cambridge University Press:  01 December 2006

J. L. Cervantes ,
P. Coelho ,
B. Barbuy  and
A. Vazdekis
J. L. Cervantes
Affiliation:
Instituto de Astrofisica de Canarias, 38200 La Laguna, Spain
P. Coelho
Affiliation:
IAG, USP, São Paulo, Brazil
B. Barbuy
Affiliation:
IAG, USP, São Paulo, Brazil
A. Vazdekis
Affiliation:
Instituto de Astrofisica de Canarias, 38200 La Laguna, Spain
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Abstract

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Choosing either an empirical or a theoretical stellar library in stellar population models is a subject of debate. Theoretical models do not perfectly match high-resolution spectra of real stars, but we can use them to overcome the natural limitations of empirical libraries on covering abundance patterns that differ from solar neighbourhood stars. Here, we will mix stellar population synthesis models based on both theoretical and empirical libraries, in order to explore a new method to constrain the enhanced α-elements pattern on galaxies.

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