Radial Velocity Studies of Close Binary Stars.XIII
Abstract
Radial-velocity measurements and sine-curve fits to the orbital radial velocity 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 semi-detached 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.
Cite
@article{arxiv.0805.1695,
title = {Radial Velocity Studies of Close Binary Stars.XIII},
author = {Slavek M. Rucinski and Theodor Pribulla and Stefan W. Mochnacki and Evgenij Liokumovich and Wenxian Lu and Heide DeBond and Archie de Ridder and Toomas Karmo and Matt Rock and J. R. Thomson and Waldemar Ogloza and Krysztof Kaminski and Piotr Ligeza},
journal= {arXiv preprint arXiv:0805.1695},
year = {2009}
}
Comments
Accepted by AJ. 19 pages including 5 figures