NLTE analysis of high-resolution spectra of CSPN

Herrero, A.; Manchado, A.; Mendez, R. H.
Referencia bibliográfica

(IAU, European Regional Astronomy Meeting on New Windows to the Universe, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640X), vol. 169, no. 1-2, July 1990, p. 183-188. Research supported by the Universitaet Muenchen and Instituto de Astrofisica de Canarias.

Fecha de publicación:
7
1990
Número de autores
3
Número de autores del IAC
1
Número de citas
15
Número de citas referidas
14
Descripción
Preliminary results of new high-resolution and S/N ratio spectra of central stars of planetary nebulae (CSPN) are presented. The atmospheric parameters (Teff, log g, helium abundance) are derived using NLTE techniques. The results obtained confirm the conclusions of Mendez et al. (1988): (1) the distance scale of CSPN is greater than usually assumed; (2) as a consequence the luminosities of the CSPN agree with the predictions of evolutionary tracks, and (3) for a given temperature, the CSPN with strong winds are more massive than the others.