2 papers
astro-ph1999
Abundance Patterns in Planetary Nebulae
Karen B. Kwitter, Richard C. Henry
We previously determined abundances of He, C, N, O, and Ne for a sample of planetary nebulae (PNe) representing a broad range in progenitor mass and metallicity, and we now compare…
astro-ph1997
Planetary Nebula Abundances, Stellar Yields, And The Galactic Evolution of C-12 and N-14
R. B. C. Henry, K. B. Kwitter, J. Buell
A project which aims to understand the abundance patterns of He, C, N, O, Ne, S, and Ar for a small sample of planetary nebulae is described. Abundance ratios of O/H, C/O, and N/O…