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Preprint 15/07

FUV Spectroscopy of the sdOB Primary of the Eclipsing Binary System AA Dor

Johannes Fleig (1), Thomas Rauch (1), Klaus Werner (1), Jeffrey W. Kruk (2)

(1) Institute for Astronomy and Astrophysic, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tübingen, Germany
(2) Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA

To be published in: Proceedings of "Hot Subdwarf Stars and Related Objects", 23 - 27 July 2007, Bamberg, Germany

Abstract. AA Dor is an eclipsing, close, post common-envelope binary (PCEB). We present a detailed spectral analysis of its sdOB primary star based on observations obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). Due to a strong contamination by interstellar absorption, we had to model both, the stellar spectrum as well as the interstellar line absorption in order to reproduce the FUV observation well and to determine the photospheric parameters precisely.

Preprint (369 kb PDF file including figures)
Astrophysics (astro-ph): 0710.1715

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