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Spectroscopic observations of nuclei of planetary nebulae

Published online by Cambridge University Press:  04 August 2017

Agnès Acker
Agnès Acker*
Affiliation:
Observatoire de Strasbourg, France

Extract

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Up to date, 1518 true, possible, and probable planetary nebulae (PN) are known in our Galaxy; 463 nuclei (NPN) were observed. For about 150 stars, a spectral study has been done; only about 30 NPN have a well studied spectrum. (Acker, Gleizes et al, 1982 “Catalogue of the central stars of true and possible PN”) It must be remembered that this is a difficult study, as the PN are very distant objects (the nearest, Helix, is about 120 pc), and that their central stars are very faint (the 35 brightest have a magnitude of from 9 to 12), are generally of a particular spectral type, and have a spectrum in which nebular lines interfere with stellar features.

Type
I. EVOLUTION OF LOW AND INTERMEDIATE MASS STARS OBSERVATIONS AND MODELS
Information
Symposium - International Astronomical Union , Volume 105: Observational Tests of the Stellar Evolution Theory , 1984 , pp. 213 - 214
Copyright
Copyright © Reidel 1984 

References

Acker, A., 1983, 5e Journée de Strasbourg : Les étoiles binaires dans le diagramme H.R., p. 103 Google Scholar
Heap, S.R., 1983, IAU Sympos. 103 (London), Reidel, p. 375 Google Scholar
Perinotto, M., 1983, IAU Sympos. 103 (London), Reidel, p. 323 Google Scholar
Other references in ACKER et al (1982) Catalogue of the Central Stars of PN (Strasbourg).Google Scholar