Model stars for the modelling of galaxies: $α$-enhancement in stellar populations models

Details Model stars for the modelling of galaxies: $α$-enhancement in stellar populations models Model stars for the modelling of galaxies: $α$-enhancement in stellar populations models

2008-02-19

arxiv.org/abs/0802.2665v1

Astronomy and Astrophysics

Astrophysics

Invited contribution to the XII Latin American IAU Regional Meeting, Isla Margarita, Venezuela. To appear in "Memorias de la R

Scientific paper

Stellar population (SP) models are an essential tool to understand the observations of galaxies and clusters. One of the main ingredients of a SP model is a library of stellar spectra, and both empirical and theoretical libraries can been used for this purpose. Here I will start by giving a short overview of the pros and cons of using theoretical libraries, i.e. model stars, to produce our galaxy models. Then I will address the question on how theoretical libraries can be used to model stellar populations, in particular to explore the effect of $\alpha$-enhancement on spectral observables.

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