Abundances of southern type I planetary nebulae

Paper

Abundances of southern type I planetary nebulae

Published Jan 1, 1991 · R. Costa, B. Barbuy, W. J. Maciel

Astronomy and Astrophysics

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Abstract

New spectroscopic data are used to determine the chemical composition of southern planetary nebulae. On the basis of He/H and N/O abundance ratios, 8 objects are classified as probable Type I nebulae, according to the classification scheme originally proposed by Peimbert

Study Snapshot

Southern planetary nebulae have 8 probable Type I nebulae, with He/H and N/O abundance ratios indicating they are likely to be a subtype of the Sun.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Abundances of southern type I planetary nebulae

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