Detection of Tertiary Components in W Ursae Majoris Systems
Paul D. HendryDavid Dunlap Observatory, University of Toronto, Richmond Hill, Canada L4C 4Y6S. W. MochnackiDavid Dunlap Observatory, University of Toronto, Richmond Hill, Canada L4C 4Y6
1998en
ABI
Annotatsiya
Extensive spectroscopic observations with good phase coverage of a small sample of W UMa systems were made at the David Dunlap Observatory. The data were found to be very sensitive to the presence of tertiary companions. All of the systems studied were found, or were previously known, to contain companion stars or binaries, including two systems not previously proven to have companions : SW Lac and V502 Oph. We suggest that the existence of tertiary components in W UMa systems is more widespread than previously known.
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