NLTE Model Atmospheres for Central Stars of Planetary Nebulae

Details NLTE Model Atmospheres for Central Stars of Planetary Nebulae NLTE Model Atmospheres for Central Stars of Planetary Nebulae

1999-09-30

arxiv.org/abs/astro-ph/9909507v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, To appear in ``Asymmetrical Planetary Nebulae II: from Origins to Microstructures,'' ASP Conference Series

Scientific paper

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.

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