Stellar yields and chemical evolution - The solar neighborhood as a calibrator

Details Stellar yields and chemical evolution - The solar neighborhood as a calibrator Stellar yields and chemical evolution - The solar neighborhood as a calibrator

1999-12-20

arxiv.org/abs/astro-ph/9912416v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figs., to appear in 'The chemical evolution of the Milky Way: stars vs clusters', F. Giovannelli & F. Matteucci, pr

Scientific paper

Uncertainties in stellar nucleosynthesis and their impact on models of chemical evolution are discussed. Comparing the Type II supernova nucleosynthesis prescriptions from Woosley & Weaver (1995) and Thielemann, Nomoto, & Hashimoto (1996), it turns out that the latter predict higher Mg/Fe ratios that are more favorable in reproducing the observed abundance features of the Milky Way. Provided that chemical evolution models are calibrated on the solar neighborhood, they offer a powerful tool to constrain structure formation. In particular, galaxy formation models that yield star formation histories significantly longer than 1 Gyr fail to reproduce the super-solar Mg/Fe ratios observed in elliptical galaxies.

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