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Chemical Composition of a Southern Planetary Nebulae Sample
Published online by Cambridge University Press: 07 August 2017
Abstract
We report the results of our analysis of a well observed sample of southern planetary nebulae. The average S/O and Ar/O ratios are comparable to the solar value and to those observed in galactic H II regions. The He abundance correlates with the N/O ratio, confirming the trend found by previous studies, indicating the surface contamination of the progenitors by dredge-up episodes.
- Type
- Near Stellar Environments
- Information
- Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 361 - 362
- Copyright
- Copyright © Kluwer 1992