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1989•Symposium - International Astronomical UnionOpen access

Abundances of C, N and O in Planetary Nebulae

A. A. Nikitin, Alexander Fedorovich Kholtygin, А.А. Сапар, T. H. Feklistova

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Abstract

The abundances of C, N and O in planetary nebulae must correspond to the evolutionary status of their progenitor red giant stars. The best spectral features for abundance determination of these elements are the recombination lines, which depend weakly on the variations of Te and ne. The abundance ratio of the ions A+ and H+ can be given by [1–3].

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The abundances of C, N and O in planetary nebulae must correspond to the evolutionary status of their progenitor red giant stars. The best spectral features for abundance determination of these elements are the recombination lines, which depend weakly on the variations of Te and ne. The abundance ratio of the ions A+ and H+ can be given by [1–3].

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Available abstract

The abundances of C, N and O in planetary nebulae must correspond to the evolutionary status of their progenitor red giant stars. The best spectral features for abundance determination of these elements are the recombination lines, which depend weakly on the variations of Te and ne. The abundance ratio of the ions A+ and H+ can be given by [1–3].

Key concepts: Planetary nebula, Abundance (ecology), Astrophysics, Stars, Physics, Ion, Recombination, Asymptotic giant branch

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