Yields from AGB Stars and their Impact on the Chemical Evolution of Dwarf Galaxies

Details Yields from AGB Stars and their Impact on the Chemical Evolution of Dwarf Galaxies Yields from AGB Stars and their Impact on the Chemical Evolution of Dwarf Galaxies

2007-09-20

arxiv.org/abs/0709.3318v1

Astronomy and Astrophysics

Astrophysics

To be published in the proceedings of the conference "Why Galaxies Care about AGB Stars", held in Vienna, August 7-11, 2006; F

Scientific paper

By means of 2--D chemodynamical simulations, we study the evolution of dwarf galaxies with structural parameters similar to IZw18 and to tidal dwarf galaxies. Different sets of yields from intermediate-mass stars are tested, in order to discover which one best reproduces the observed chemical compositions (in particular for nitrogen). Different choices of yields from intermediate-mass stars lead to differences of up to 0.3--0.6 dex, depending on the assumptions. It is also shown that, given the dependence of the cooling function on the metallicity, the dynamics of galaxies is also significantly affected by the choice of nucleosynthetic yields.

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