Galactic evolution of carbon and oxygen with metallicity dependent yields
We study the evolution of carbon and oxygen in our Galaxy taking into account several recent observational and theoretical results and, in particular, metallicity dependent yields from massive stars. We find that: i) if the duration of the halo phase has been as long as ∼ 1–2 Gyr, intermediate mass stars cannot be the main carbon source; ii) massive stars with metallicity dependent carbon yields could be the main source of carbon during the whole galactic evolution, leaving little room for other sources. However, current uncertainties in the theoretical stellar yields and the observationally determined stellar abundances do not allow us to draw definite conclusions.
KeywordsMass Star Star Formation Rate Carbon Yield Star Formation History Dependent Yield
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- Prantzos N., Vangioni-Flam E., & Chauveau S., 1993, Astron. Astrophys., in pressGoogle Scholar