Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...285..132p&link_type=abstract
Astronomy and Astrophysics 285, 132-139 (1994)
Astronomy and Astrophysics
Astrophysics
57
Stellar Nucleosynthesis, Galaxy: Evolution, Galaxy: Abundances
Scientific paper
The evolution of carbon and oxygen in our Galaxy is studied, in view of recent observational and theoretical results and with a detailed model of galactic chemical evolution, making use of metallicity dependent yields from massive stars. It is found that: i) the evolution of oxygen is slightly affected by the introduction of metallicity dependent yields, whereas the effect on carbon is much more interesting; ii) if the duration of the halo phase has been as long as ~1-2 Gyr, intermediate mass stars cannot be the main carbon source, contrary to a widely accepted idea; iii) massive stars, with metallicity dependent carbon and oxygen yields, could be the main source of carbon during the whole galactic evolution, leaving little room for other carbon sources. However, current uncertainties on the theoretical stellar yields and the observationally determined stellar abundances prevent form definite conclusions.
Chauveau S.
Prantzos Nikos
Vangioni-Flam Elisabeth
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