Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-12-01
Astronomy and Astrophysics
Astrophysics
11 pages, 2 figures, invited review to appear in "The Metal-Rich Universe", (La Palma, June 2006), eds. G. Israelian and G. Me
Scientific paper
I present a review of chemical evolution models of the solar neighborhood. I give special attention to the necessary ingredients to reproduce the observed [Xi/Fe] ratios in nearby metal and super metal rich stars, and to the chemical properties of the solar vicinity focusing on [Fe/H] > -0.1. I suggest that the observed abundance trends are due to material synthesized and ejected by intermediate mass stars with solar metallicity in the AGB stage, and also by massive stars with (super) solar metallicity in the stellar wind and supernovae stages. The required tool to build chemical evolution models that reach super-solar metallicities is the computation of stellar yields for stellar metallicities higher than the initial solar value. Based on these models it might be possible to estimate the importance of merger events in the recent history of the Galactic disk as well as the relevance of radial stellar migration from the inner to the outer regions of the Galaxy. I also present a short review of the photospheric solar abundances and their relation with the initial solar abundances.
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