AADor -- An Eclipsing Post Common-Envelope Binary

Details AADor -- An Eclipsing Post Common-Envelope Binary AADor -- An Eclipsing Post Common-Envelope Binary

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..233r&link_type=abstract

Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

AA Dor (LB 3459) is an eclipsing, close, single-lined, post common-envelope binary (PCEB) consisting of an sdOB primary star and an unseen secondary with an extraordinary small mass -- formally a brown dwarf. The brown dwarf may have been a former planet which survived a common envelope phase and has even gained mass.
A recent determination of the components' masses from results of state-of-the-art NLTE spectral analysis and subsequent comparison to evolutionary tracks shows a discrepancy between masses derived from radial-velocity and the eclipse curves. Phase-resolved high-resolution and high-SN spectroscopy was carried out with FUSE in order to investigate this problem. We present preliminary results of an ongoing NLTE spectral analysis of FUSE spectra of the primary.

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