Contact binaries with additional components. III. The adaptive optics detections

Details Contact binaries with additional components. III. The adaptive optics detections Contact binaries with additional components. III. The adaptive optics detections

2007-03-27

arxiv.org/abs/astro-ph/0703693v2

Astron.J.134:2353-2365,2007

Astronomy and Astrophysics

Astrophysics

Full Figs.4 and 5 are in http://www.astro.utoronto.ca/~rucinski/Triples3/

Scientific paper

10.1086/523353

We present results of the CFHT adaptive optics search for companions of a homogeneous group of contact binary stars, as a contribution to our attempts to prove a hypothesis that these binaries require a third star to become so close as observed. In addition to companions directly discovered at separations of >=1", we introduced a new method of AO image analysis utilizing distortions of the AO diffraction ring pattern at separations of 0.07"-1". Very close companions, with separations in the latter range were discovered in systems HV Aqr, OO Aql, CK Boo, XY Leo, BE Scl, and RZ Tau. More distant companions were detected in V402 Aur, AO Cam, V2082 Cyg. Our results provide a contribution to the mounting evidence that the presence of close companions is a very common phenomenon for very close binaries with orbital periods <1 day.

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