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Title:
FUSE Spectroscopy of the DAO-type Central Star LS V+46° 21: Looking for the Photosphere in the Sea of Interstellar Absorption
Authors:
Ziegler, M.; Rauch, T.; Werner, K.; Kruk, J. W.; Oliveira, C.
Publication:
15th European Workshop on White Dwarfs ASP Conference Series, Vol. 372, proceedings of the conference held 7-11 August, 2006 in Leicester, United Kingdom. Edited by Ralf Napiwotzki and Matthew R. Burleigh. San Francisco: Astronomical Society of the Pacific, 2007., p.197
Publication Date:
09/2007
Origin:
ASP
Bibliographic Code:
2007ASPC..372..197Z

Abstract

The far-ultraviolet spectrum of the DAO white dwarf LS V+46° 21 the exciting star of the possible planetary nebula Sh 2-216, is strongly contaminated by absorption features from the interstellar medium (ISM). For an ongoing spectral analysis, we aim to extract the pure photospheric spectrum in order to identify and model metal lines of species which are not detectable in the near-ultraviolet wavelength range.

We have modelled the interstellar absorption precisely and considered it for the simulation of the FUSE observation. A state-of-the-art NLTE model-atmosphere spectrum which includes 16 elements is combined with the ISM absorption and then compared with the FUSE spectrum.

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