Studies of southern planetary nebulae. III - Chemical abundances

Mathematics – Logic

Scientific paper

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Abundance, Chemical Composition, Planetary Nebulae, Argon, Carbon, Error Analysis, Helium, Neon, Oxygen, Sulfur

Scientific paper

Abundances of He, O, N, Ne, Ar, and S are determined for 14 planetary nebulae previously observed by the authors in the visual region. Carbon abundances obtained on the basis of the observed intensity of C II λ4267 are also included. The results are compared with those presented by other authors and the differences are discussed. The main causes of errors are reviewed.

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