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Chemical enrichment and feedback in low metallicity environments: constraints on galaxy formation

Published online by Cambridge University Press:  01 June 2008

Francesca Matteucci
Francesca Matteucci*
Affiliation:
Dipartimento di Astronomia, Trieste UniversityVia G.B. Tiepolo 11, 34131 Trieste, Italy Italian National Institute for Astrophysics (INAF), Trieste Via G.B. Tiepolo 11, 34131 Trieste, Italy email: [email protected]
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Abstract

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Chemical evolution models for dwarf metal poor galaxies, including dwarf irregulars and dwarf spheroidals will be presented. The main ingredients necessary to build detailed models of chemical evolution including stellar nucleosynthesis, supernova progenitors, stellar lifetimes and stellar feedback will be discussed. The stellar feedback will be analysed in connection with the development of galactic winds in dwarf galaxies and their effects on the predicted abundances and abundance ratios. Model results concerning α-elements (O, Mg, Si, Ca), Fe and s-and r-process elements will be discussed and compared with the most recent observational data for metal poor galaxies of the Local Group. We will show how the study of abundance ratios versus abundances can represent a very powerful tool to infer constraints on galaxy formation mechanisms. In this framework, we will discuss whether, on the basis of their chemical properties, the dwarf galaxies of the Local Group could have been the building blocks of the Milky Way.

Keywords

ISM: abundancesgalaxies: abundancesgalaxies: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S255: Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies , June 2008 , pp. 134 - 141
Copyright
Copyright © International Astronomical Union 2008

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