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Chemical abundances of galactic planetary nebulae

Published online by Cambridge University Press:  07 August 2017

A. Acker ,
J. Köppen ,
B. Stenholm  and
G. Jasniewicz
A. Acker
Affiliation:
Observatoire de Strasbourg, France
J. Köppen
Affiliation:
Institut für Theoretische Astrophysik, Heidelberg, Germany
B. Stenholm
Affiliation:
Lund Observatory, Sweden
G. Jasniewicz
Affiliation:
Observatoire de Strasbourg, France

Abstract

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The chemical composition of 86 planetary nebulae from the Strasbourg-ESO survey are analysed (Acker et al., 1989; Köppen et al., 1991). Strong correlations between O, S, Ar, as well as between N and N/O are found. Galactic radial gradients for the abundances of He, S, and Ar in the old disk nebulae are found in accord with the results of Faúndez-Albans and Maciel (1986). The S gradient is steeper than that of O, and the S/O ratio decreases with increasing distance from the galactic centre, which is quite different from the result deduced from HII regions.

Keywords

GalaxyPlanetary nebulaeChemical composition
Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 149: The Stellar populations of Galaxies , 1992 , pp. 383
Copyright
Copyright © Kluwer 

References

Acker, A., Köppen, J., Stenholm, B., Jasniewicz, G.: 1989, Astron. Astrophys. Suppl. 80, 201.Google Scholar
Köppen, J., Acker, A., Stenholm, B.: 1991, Astron. Astrophys. , in press.Google Scholar
Faúndez-Albans, M., Maciel, W.: 1986, Astron. Astrophys. 158, 228.Google Scholar