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Planetary Nebulae by the Strong [NII] Emission Lines
Published online by Cambridge University Press: 07 August 2017
Abstract
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The sample of planetaries with the strong [NII] emission lines are analysed. All available parameters are discussed. The enrichments of all elements and the tendency to rather low surface brightness of ne bulae in Hβ flux are remarked. The deficiency of hydrogen in envelopes is proposed as the possible reason of observational spectra.
- Type
- III. Highlights on the Nebulae
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- Copyright
- Copyright © Kluwer 1993
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