Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-05-02
Astronomy and Astrophysics
Astrophysics
6 pages, 3 figures, use iauc.cls. Oral presentation to appear in the proceedings of "IAU Colloquium 198 - Near-Field Cosmology
Scientific paper
10.1017/S1743921305003741
We present preliminary results of 3-D hydro simulations of the interstellar medium evolution in dwarf spheroidal galaxies undergoing star formation for the first time. The star formation is assumed to occur in a sequence of instantaneus bursts separated by quiescent periods. Different models are made changing the number and the intensity of the bursts in such a way that the final mass of the formed stars remains the same. We followed the enrichment of the ISM taking into account the contribution of both type Ia and II supernovae. The aim of our models is to find a star formation history compatible with the observed spread of stellar age and metallicity in such galaxies and to reproduce the observed mass-metallicity relation.
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Brighenti Fabrizio
D'Ercole Annibale
Marcolini Andrea
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