ADS
Radial Velocity Studies of Close Binary Stars. XIII
Abstract
Radial velocity (RV) measurements and sine-curve fits to the orbital RV variations are presented for ten close binary systems: EG Cep, V1191 Cyg, V1003 Her, BD+7°3142, V357 Peg, V407 Peg, V1123 Tau, V1128 Tau, HH UMa, and PY Vir. While most of the studied eclipsing systems are contact binaries, EG Cep is a detached or a semidetached double-lined binary and V1003 Her is a close binary of an uncertain type seen at a very low inclination angle. We discovered two previously unknown triple systems, BD+7°3142 and PY Vir, both with late spectral-type (K2V) binaries. Of interest is the low mass-ratio (q = 0.106) close binary V1191 Cyg showing an extremely fast period increase; the system has a very short period for its spectral type and shows a W-type light curve, a feature rather unexpected for such a low mass-ratio system.
Based on the data obtained at the David Dunlap Observatory, University of Toronto.- Publication:
- The Astronomical Journal
- Pub Date:
- August 2008
- DOI:
- arXiv:
- arXiv:0805.1695
- Bibcode:
- 2008AJ....136..586R
- Keywords:
- binaries: close;
- binaries: eclipsing;
- binaries: spectroscopic;
- Astrophysics
- E-Print:
- Accepted by AJ. 19 pages including 5 figures
