Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-20
Astronomy and Astrophysics
Astrophysics
A&A accepted, replaced with final version after the peer-review process
Scientific paper
10.1051/0004-6361:20078121
The scope of this paper is two-fold: i) to test and improve our previous models of an outside-in formation for the majority of ellipticals in the context of the SN-driven wind scenario, by means of a careful study of gas inflows/outflows; ii) to explain the observed slopes, either positive or negative, in the radial gradient of the mean stellar [alpha/Fe], and their apparent lack of any correlation with all the other observables. In order to pursue these goals we present a new class of hydrodynamical simulations for the formation of single elliptical galaxies in which we implement detailed prescriptions for the chemical evolution of H, He, O and Fe. We find that all the models which predict chemical properties (such as the central mass-weighted abundance ratios, the colours as well as the [
D'Ercole Annibale
Matteucci Francesca
Pipino Antonio
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