Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-07-11
Astronomy and Astrophysics
Astrophysics
8 pages, 1 figure, to appear in proceedings of IAU Symposium 234, "Planetary Nebulae in Our Galaxy and Beyond," eds. R. Mendez
Scientific paper
10.1017/S174392130600305X
The determinations of element abundances in red-giant stars and in particular in AGB stars are reviewed and the resulting abundances are compared with those obtained for planetary nebulae in the Galaxy and in nearby galaxies. The problems, possibilities and implications of such comparisons when estimating yields from low-mass and intermediate-mass stars are illustrated and commented on.
Gustafsson Bengt
Wahlin Rurik
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