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Preprint 02/06

NLTE Spectral Analysis of GW Vir Pulsators

E. Reiff (1), D. Jahn (1), T. Rauch (1), K. Werner (1), J.W. Kruk (2), F. Herwig (3)

(1) Institut für Astronomie und Astrophysik, Universität Tübingen
(2) Johns Hopkins University, Baltimore, Maryland, USA
(3) Los Alamos National Laboratory, New Mexico, USA

To be published in: Proceedings of the PhD School on "Astrophysics of Variable Stars", eds. C. Sterken and C. Aerts, ASP Conference Series Vol. 349

Abstract. GW Vir variables are the pulsating members in the spectroscopic class of PG 1159 stars. In order to understand the characteristic differences between pulsating and non-pulsating PG 1159 stars, we analyse FUSE spectra of eleven objects, of which six are pulsating, by means of state-of-the-art NLTE model atmospheres. The numerous metal lines in the FUV spectra of these stars allow a precise determination of the photospheric parameters. We present here preliminary results of our analysis.
 

Preprint (146 kb PDF file including figures)
Astrophysics (astro-ph): astro-ph/0601566

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