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Astron. Astrophys. 347, 975-982 (1999)
The ISO spectrum of the planetary nebula NGC 6302
II. Nebular abundances
S.R. Pottasch 1 and
D.A. Beintema 2
1 Kapteyn Astronomical Institute, P.O. Box 800, 9700 AV Groningen, The Netherlands
2 SRON Laboratory for Space Research, P.O. Box 800, 9700 AV Groningen, The Netherlands
Received 2 February 1999 / Accepted 9 April 1999
Abstract
The ISO spectrum of NGC 6302 is used, in conjunction with the visible and ultraviolet spectrum, to determine the nebular composition. In addition to being considerably more accurate than previous determinations, the abundances of many more elements (and ions) can be found. A discussion of the previous evolution of the central star, in the light of these abundances, is given. A discussion is also given of the composition of the dust.
Key words: stars:
abundances 
stars:
evolution
ISM: planetary nebulae: individual: NGC
6302
infrared: ISM: lines and bands
Send offprint requests to: pottasch@astro.rug.nl
Contents
- 1. Introduction
- 2. Method of analysis
- 3. Electron density
- 4. Electron temperature
- 5. Ionic abundances
- 6. Comparison with other abundance determinations
- 7. Comparison with abundances in the Sun and B stars
- 8. Comparison with abundances in the nearby interstellar medium
- 9. The outer regions of NGC 6302: the LWS measurements
- 10. Discussion and conclusions
- 10.1. Missing stages of ionization
- 10.2. Temperature fluctuations
- 10.3. Nebular masses
- 10.4. Abundances and dust depletions
- 10.5. Abundances and evolution
- Acknowledgements
- References
© European Southern Observatory (ESO) 1999
Online publication: June 6, 1999
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