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Planetary Nebulae by the Strong [NII] Emission Lines

Published online by Cambridge University Press:  07 August 2017

L. N. Kondratjeva*
Affiliation:
Astrophysical Institute of Kazakh Academy of Sciences, Kamenskoje Plato, 480068 Alma-Ata, Kazakhstan

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
Copyright
Copyright © Kluwer 1993