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Preprint 10f/00

Application of Stratified Non-LTE Model Atmospheres to hot DA White Dwarfs

Sonja Schuh (1), Stefan Dreizler (1), Burkhard Wolff (2)

(1) Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Waldhäuser Str. 64, D-72076 Tübingen, Germany
(2) Institut für Theoretische Physik und Astrophysik, Universität Kiel, Leibnizstraße 15, D-24098 Kiel, Germany

To appear in: The 12th European Workshop on White Dwarfs, ASP Conference Series, Vol. xxx, 2001, H.L. Shipman and J.L. Provencal, eds.

Abstract. Spectroscopic EUV data are used as an observational basis to test chemically stratified, self-consistently constructed non-LTE stellar atmosphere models as presented elsewhere in these proceedings for hot DA white dwarfs. New parameters are being derived for the sample stars and successfully interpreted within the framework of diffusion theory. This is in fact the first time that equilibrium abundance calculations are found to be in good agreement with observations for a large sample.

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Paper (52k gzip'ed Postscript including figures)

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