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Abundances of C, N and O in Planetary Nebulae

Published online by Cambridge University Press:  19 July 2016

A. A. Nikitin ,
A. F. Kholtygin ,
A. A. Sapar  and
T. H. Feklistova
A. A. Nikitin
Affiliation:
Leningrad State University, Astron. Observatory, USSR
A. F. Kholtygin
Affiliation:
Leningrad State University, Astron. Observatory, USSR
A. A. Sapar
Affiliation:
W. Struve Astrophys. Observatory, Toravere, Tartu, USSR
T. H. Feklistova
Affiliation:
W. Struve Astrophys. Observatory, Toravere, Tartu, USSR

Abstract

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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].

Type
II. Nebular Properties
Information
Symposium - International Astronomical Union , Volume 131: Planetary Nebulae , 1989 , pp. 218
Copyright
Copyright © Kluwer 1989