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Chemical Evolution of Galaxies and Nature of High Redshift Objects
Authors:Francesca Matteucci  Francesco Calura
Affiliation:(1) Department of Astronomy, University of Trieste, Trieste, Italy
Abstract:We review the methodology adopted in computing chemical evolution models of galaxies of different morphological type (ellipticals, spirals and irregulars). We discuss the importance of the history of star formation in different galaxies in order to interpret the observed abundances. In particular, we discuss the time-delay model which allows us to interpret the observed abundance patterns in galaxies as due to the different contributions of supernovae II and Ia. We show that the time-delay model applied to galaxies of different morphological type predicts different [X/Fe] versus [Fe/H] relations in different galaxies. As a consequence of this, these relations can be used to infer the nature and to date high redshift objects. Finally, we show our predictions for the cosmic star formation rate.
Keywords:galaxies: formation  galaxies: evolution
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