High resolution spectroscopy of central stars of planetary nebulae. I - Basic atmospheric parameters and their interpretation

Mendez, R. H.; Kudritzki, R. P.; Herrero, A.; Husfeld, D.; Groth, H. G.
Referencia bibliográfica

Astronomy and Astrophysics (ISSN 0004-6361), vol. 190, no. 1-2, Jan. 1988, p. 113-136.

Fecha de publicación:
1
1988
Número de autores
5
Número de autores del IAC
0
Número de citas
275
Número de citas referidas
240
Descripción
The authors have obtained high-resolution spectrograms of H-rich central stars of planetary nebulae (CSPN) with the 3.6 m telescope and Cassegrain echelle spectrograph of the European Southern Observatory. They have determined the basic atmospheric parameters (Teff, log g, photospheric He abundance) for 22 of these CSPN, by fitting the observed stellar H and He absorption line profiles with theoretical profiles, obtained from improved non-LTE model atmosphere and line formation calculations. Restricting the attention to those CSPN that are post-AGB objects, the distances have been calculated that result from the assumption that the theoretical mass-luminosity relation for post-AGB stars is valid for CSPN.