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Preprint 09b/99

NLTE Model Atmospheres for Central Stars of Planetary Nebulae

Thomas Rauch, Jochen L. Deetjen, Stefan Dreizler, Klaus Werner

Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Waldhäuser Str. 64, D-72076 Tübingen, Germany

To appear in: Asymmetrical Planetary Nebulae II: From Origins to Microstructures, ASP Conference Series, Vol. XXX, J.H. Kastner, N. Soker, & S. Rappaport, eds., 2000

Abstract. Present observational techniques provide stellar spectra with high resolution at a high signal-to-noise ratio over the complete wavelength range - from the far infrared to the X-ray.
NLTE effects are particularly important for hot stars, hence the use of reliable NLTE stellar model atmosphere fluxes is required for an adequate spectral analysis.
State-of-the-art NLTE model atmospheres include the metal-line blanketing of millions of lines of all elements from hydrogen up to the iron-group elements and thus permit precise analyses of extremely hot compact stars, e.g. central stars of planetary nebulae, PG 1159 stars, white dwarfs, and neutron stars. Their careful spectroscopic study is of great interest in several branches of modern astrophysics, e.g. stellar and galactic evolution, and interstellar matter.

Key words: -

Paper (570k gzip'ed Postscript including figures)

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