Stellar populations in bulges of Milky Way type galaxies

GARGIULO I. D.; CORA S. A; PADILLA N. D.; GONZÁLEZ O.; ZOCCALI M.

Tandil

Congreso; Reunión Anual de la Asociación Argentina de Astronomía; 2013

We make use of a semi-analytic model of galaxy formation to study the chemical properties of the stellar populations (SPs) of bulges of Milky Way (MW) type galaxies. Our goal is to contribute to the understanding of the formation mechanisms of bulges in general and of the MW bulge in particular. We compare spectroscopic and photometric stellar metallicity distributions with our model results. We obtain good agreement when comparing with spectroscopic metallicities, while the comparison with photometric values points to a deficit in metals in the model bulges. We attribute this difference to the fact that ages of stellar SPs in the model are underestimated.