Radial Velocity Studies of Close Binary Stars.IV

Details Radial Velocity Studies of Close Binary Stars.IV Radial Velocity Studies of Close Binary Stars.IV

2001-04-03

arxiv.org/abs/astro-ph/0104065v1

Astronomy and Astrophysics

Astrophysics

aastex5.0, 5 figures in PS; submitted to Astron.J

Scientific paper

10.1086/321131

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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