PN-Carbon Yields and the Chemical Evolution of the Galaxy

Details PN-Carbon Yields and the Chemical Evolution of the Galaxy PN-Carbon Yields and the Chemical Evolution of the Galaxy

2001-03-09

arxiv.org/abs/astro-ph/0103153v1

Astronomy and Astrophysics

Astrophysics

2 pages, Proceedings of the conference "Ionized Gaseous Nebulae", Nov 21-24, 2000; RevMexAA in press

Scientific paper

Two sets of observational carbon stellar yields for low-and-intermediate mass stars are computed from planetary nebulae abundances derived from C II $\lambda4267$ and C III $\lambda\lambda1906+1909$ lines, respectively. By comparing C/O values observed in stars of the solar vicinity and Galactic HII regions with those predicted by chemical evolution models for the Galaxy, which assume these observational yields, I conclude that the C abundances derived from permitted lines are better than those derived from forbidden lines.

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