Discovery of Hα satellite emission in a low state of the SW Sextantis star BB Doradus

Bibcode
2012MNRAS.422..731S
DOI
10.1111/j.1365-2966.2012.20653.x
Schmidtobreick, L.; Rodríguez-Gil, P.; Long, K. S.; Gänsicke, B. T.; Tappert, C.; Torres, M. A. P.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 422, Issue 1, pp. 731-737.

Advertised on:
5
2012
Journal
Monthly Notices of the Royal Astronomical Society
Number of authors
6
IAC number of authors
1
Citations
12
Refereed citations
10
Description
BB Dor was observed during its low 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 Hα, He I and Na D, as well as TiO absorption troughs, trace the motion of the irradiated secondary star. We detect two additional components in the Hα 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.
Related projects
Representación de la variable cataclísmica SS Cygni (Chris Moran)
Binary Stars
The study of binary stars is essential to stellar astrophysics. A large number of stars form and evolve within binary systems. Therefore, their study is fundamental to understand stellar and galactic evolution. Particularly relevant is that binary systems are still the best source of precise stellar mass and radius measurements. Research lines
Pablo
Rodríguez Gil
In progress
Type
Refereed
Stellar & Interstellar Physics (FEEI)
Accretion
Magnetic fields
Novae

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