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Radial Velocity Studies of Close Binary Stars. IV.

Wenxian LuCurrent address: NASA Goddard Space Flight Center, Code 664, 8800 Greenbelt Road, Greenbelt, MD 20771Slavek M. RucinskiDavid Dunlap Observatory, University of Toronto, P.O. Box 360, Richmond Hill, ON L4C 4Y6, CanadaWaldemar OgŁłozaMount Suhora Observatory, Cracow Pedagogical University, ul. Podchorażych 2, 30-084 Kraków, Poland

2001en

ABI

Annotatsiya

Radial-velocity measurements and sine-curve fits to the orbital velocity variations are presented for the fourth set of ten close binary systems: 44 Boo, FI Boo, V2150 Cyg, V899 Her, EX Leo, VZ Lib, SW Lyn, V2377 Oph, Anon Psc (GSC 8-324), HT Vir. All systems are double-lined spectroscopic binaries with only two of them not being contact systems (SW Lyn and GSC 8-324) and with five (FI Boo, V2150 Cyg, V899 Her, EX Leo, V2377 Oph) being the recent photometric discoveries of the Hipparcos satellite project. Five of the binaries are triple-lined systems (44 Boo, V899 Her, VZ Lib, SW Lyn, HT Vir). Three (or possibly four) companions in the triple-lined systems show radial-velocity changes during the span of our observations suggesting that these are in fact quadruple systems. Several of the studied systems are prime candidates for combined light and radial-velocity synthesis solutions.

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DOI: 10.1086/321131

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