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Preprint 09b/02

Computation of Element Diffusion in Non-LTE Stellar Atmosphere Models

Sonja L. Schuh and Stefan Dreizler

Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Sand 1, D-72076 Tübingen, Germany

In: Workshop on Stellar Atmosphere Modeling, held 8-12 April 2002 in Tübingen, Germany. Editors: I. Hubeny, D. Mihalas, K. Werner, ASP Conference Series 288, 633 (2003)

Abstract. We present a model grid of chemically stratified stellar atmospheres for hot DA white dwarfs. The presence of traces of metals in their hydrogen rich atmospheres strongly affects the emergent flux. The abundances and depth dependent stratification patterns of these metals are predicted self-consistently by the models, using an equilibrium condition for the interplay between gravitational settling and radiative levitation.

Key words: -

Paper (268k gzip'ed Postscript including figures)

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