Details

Autor(en) / Beteiligte

• Reed, Phillip A.
• McCluskey, George E.
• Kondo, Yoji
• Sahade, Jorge
• Guinan, Edward F.
• Giménez, Alvaro
• Caton, Daniel B.
• Reichart, Daniel E.
• Ivarsen, Kevin M.
• Nysewander, Melissa C.

Titel

Ultraviolet study of the active interacting binary star R Arae using archival IUE data

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2010-01, Vol.401 (2), p.913-923

Ort / Verlag

Oxford, UK: Blackwell Publishing Ltd

Erscheinungsjahr

2010

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• The eclipsing and strongly interacting binary star system R Arae (HD 149730) is in a very active and very short-lived stage of its evolution. R Ara consists of a B9V primary and an unknown secondary. We have collected the International Ultraviolet Explorer (IUE) archival data on R Ara, with most of the data being studied for the first time. There are 117 high-resolution IUE spectra taken in 1980, 1982, 1985, 1989 and 1991. We provide photometric and spectroscopic evidence for mass transfer and propose a geometry for the accretion structure. We use colour-scale radial velocity plots to view the complicated behaviour of the blended absorption features and to distinguish the motions of hotter and cooler regions within the system. We observed a primary eclipse of R Ara in 2008 and have verified that its period is increasing. A model of the system and its evolutionary status is presented.