Institut für Astronomie und Astrophysik

Abteilung Astronomie

Preprint 02a/98

Iron and Nickel abundances in DA white dwarfs and sdO stars

K. Werner(1), S. Dreizler(1), S. Haas(2), U. Heber(2)

(1)Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Waldhäuser Str. 64, D-72076 Tübingen, Germany
(2)Sternwarte Bamberg, Universität Erlangen-Nüurnberg, Germany

in Ultraviolet Astrophysics Beyond the IUE Final Archive, November 11-14, 1997, Sevilla, Spain, (Eds. R.González-Riestra, W. Wamsteker, R.A. Harris), ESA Publication Division, ESA-SP 413

Abstract. High resolution UV spectroscopy with IUE has enabled the first detection and quantitative analysis of iron group elements in hot compact stars. The results suggest that radiative acceleration and gravitational settling are responsible for the observed heavy element abundances.

Key words: stellar atmospheres; hot subdwarfs; white dwarfs

Paper (312k gzip'ed Postscript including figures)

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Jürgen Barnstedt (barnstedt AT astro.uni-tuebingen.de) Last updated 27-Jul-1998