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Ecology of galaxy stellar populations from optical spectroscopic surveys

Published online by Cambridge University Press:  13 April 2010

Anna Gallazzi
Anna Gallazzi*
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany email: gallazzi@mpia.de
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Abstract

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The age and chemical composition of the stars in present-day galaxies carry important clues about their star formation processes. The latest generation of population synthesis models have allowed to derive age and stellar metallicity estimates for large samples of low-redshift galaxies. After reviewing the main results about the distribution in ages and metallicities as a function of galaxy mass, I will concentrate on recent analysis that aims at disentangling the dependences of stellar populations properties on environment and on galaxy stellar mass. Finally, new models that predict the response of the full spectrum to variations in [α/Fe] will allow us to derive accurate estimates of elements abundance ratios and gain deeper insight into the timescales of star formation cessation.

Keywords

galaxies: evolutiongalaxies: formationgalaxies: fundamental parameterssurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S262: Stellar Populations – Planning for the Next Decade , August 2009 , pp. 205 - 208
Copyright
Copyright © International Astronomical Union 2010

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