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NLTE analysis of central stars of highly excited Planetary Nebulae

Published online by Cambridge University Press:  25 May 2016

T. Rauch ,
J. Köppen ,
R. Napiwotzki  and
K. Werner
T. Rauch
Affiliation:
1Institut für Astronomie und Astrophysik, Universität Kiel 2Lehrstuhl Astrophysik, Universität Potsdam 3Institut für Astronomie und Astrophysik, Universität Tübingen
J. Köppen
Affiliation:
1Institut für Astronomie und Astrophysik, Universität Kiel 4Observatoire Astronomique, Strasbourg
R. Napiwotzki
Affiliation:
5Dr.-Remeis-Sternwarte Bamberg
K. Werner
Affiliation:
2Lehrstuhl Astrophysik, Universität Potsdam 3Institut für Astronomie und Astrophysik, Universität Tübingen

Extract

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Very hot central stars (CSPN) of highly excited planetary nebulae (PN) display directly the formation of white dwarfs. Only a few of these CSPN have been analyzed so far due to their low brightness and thus, the interpretation of their evolutionary status is hampered by statistical incompleteness. In the last decade many spectral analyses of very hot post-AGB stars by means of state-of-the-art NLTE model atmospheres have been performed (e.g. Rauch et al. 1996; Werner & Rauch 1994; Rauch & Werner 1995) and our picture of post-AGB evolution has been improved.

Type
III. Central Stars
Information
Symposium - International Astronomical Union , Volume 180: Planetary Nebulae , 1997 , pp. 132
Copyright
Copyright © Kluwer 1997 

References

Acker, A., Ochsenbein, F., Tylenda, R., Marcout, J., Schohn, C. 1992, Strasbourg-ESO Catalogue of galactic planetary nebulae.Google Scholar
Rauch, T., Werner, K. 1995, in: White Dwarfs, eds. Koester, D., Werner, K.. Lecture Notes in Physics 443, Springer, Berlin, p. 186.Google Scholar
Rauch, T., Köppen, J., Werner, K. 1996, A&A 310, 613.Google Scholar
Werner, K., Rauch, T. 1994, A&A 284, L5.Google Scholar