Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2012-02-02
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
7 pages, 8 figures, accepted by MNRAS
Scientific paper
BB Dor was observed during its low state state in 2009. Signatures of both binary components are revealed in the average optical spectrum; no signature of accretion is observed. Narrow emission lines of Halpha, HeI and Na-D, as well as TiO absorption troughs trace the motion of the irradiated secondary star. We detect two additional components in the Halpha emission line that share many characteristics of similar "satellite" lines observed in the low state of magnetic cataclysmic variables of AM Her type. It is the first time such emission components are detected for an SW Sex star.
Gaensicke Boris T.
Long Knox S.
Rodríguez-Gil Pablo
Schmidtobreick Linda
Tappert Claus
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