1998A&A...334..505P -
Astronomy and Astrophysics, volume 334, 505-539 (1998/6-2)
Galactic chemical enrichment with new metallicity dependent stellar yields.
PORTINARI L., CHIOSI C. and BRESSAN A.
Abstract (from CDS):
New detailed stellar yields of several elemental species are derived for massive stars in a wide range of masses (from 6 to 120M
☉) and metallicities (Z=0.0004, 0.004, 0.008, 0.02, 0.05). Our calculations are based on the Padova evolutionary tracks and take into account recent results on stellar evolution, such as overshooting and quiescent mass-loss, paying major attention to the effects of the initial chemical composition of the star. We finally include modern results on explosive nucleosynthesis in SNae by Woosley & Weaver (
1995ApJS..101..181W). The issue of the chemical yields of Very Massive Objects (from 120 to 1000M
☉) is also addressed. Our grid of stellar yields for massive stars is complementary to the results by Marigo et al. (
1996A&A...313..545M,
1998A&A...331..564M) on the evolution and nucleosynthesis of low and intermediate mass stars, also based on the Padova evolutionary tracks. Altogether, they represent a complete set of stellar yields of unprecedented homogeneity and self-consistency. Our new stellar yields are inserted in a code for the chemical evolution of the Galactic disc with infall of primordial gas, according to the formulation first suggested by Talbot & Arnett (
1971ApJ...170..409T,
1973ApJ...186...51T,
1975ApJ...197..551T) and Chiosi (
1980A&A....83..206C). As a first application, the code is used to develop a model of the chemical evolution of the Solar Vicinity, with a detailed comparison to the available observational constraints.
Abstract Copyright:
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Journal keyword(s):
nuclear reactions, nucleosynthesis, abundances - stars: mass loss - supernovae: general - Galaxy: evolution - Galaxy: abundances - solar neighbourhood
Simbad objects:
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