The Chemical Evolution of the Galactic Bulge |
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Authors: | F Matteucci D Romano |
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Institution: | (1) Dipartimento di Astronomia, Università di Trieste, Via G.B. Tiepolo 11, 34100 Trieste and;(2) SISSA/ISAS, Via Beirut 2-4, 34014 Trieste, Italy;(3) Osservatorio Astronomico di Trieste, Via G.B. Tiepolo 11, 34100 Trieste and |
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Abstract: | In this paper we review the chemical evolution models for the Galactic bulge: in particular, we discuss the predictions of
models as compared with the available abundance data and infer the mechanism as well as the time scale for the formation of
the Galactic bulge. We show that good chemical evolution models reproducing the observed metallicity distribution of stars
in the bulge predict that the α/Fe] >0 over most of the metallicity range. This is a very important constraint indicating
that the bulge of our Galaxy formed at the same time and even faster than the inner Galactic halo. We also discuss predictions
for the evolution of light elements such as D and 7Li and conclude that the D astration should be maximum due to the high star formation rate required for the bulge whereas
the evolution of the abundance of Li should be similar to that observed in the solar neighbourhood, but with an higher Li
abundance in the interstellar medium at the present time.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | |
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