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Abundances of C, N and O in Planetary Nebulae
Published online by Cambridge University Press: 19 July 2016
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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- II. Nebular Properties
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- Copyright © Kluwer 1989
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