Radial Velocity Studies of Close Binary Stars. XIV

Abstract

Radial-velocity measurements and sine-curve fits to the orbital radial velocity variations are presented for ten close binary systems: TZ Boo, VW Boo, EL Boo, VZ CVn, GK Cep, RW Com, V2610 Oph, V1387 Ori, AU Ser, and FT UMa. Our spectroscopy revealed two quadruple systems, TZ Boo and V2610 Oph, while three stars showing small photometric amplitudes, EL Boo, V1387 Ori, and FT UMa, were found to be triple systems. GK Cep is close binary with a faint third component. While most of the studied eclipsing systems are contact binaries, VZ CVn and GK Cep are detached or semi-detached double-lined binaries, and EL Boo, V1387 Ori and FT UMa are close binaries of uncertain binary type. The large fraction of triple and quadruple systems found in this sample supports the hypothesis of formation of close binaries in multiple stellar systems; it also demonstrates that low photometric amplitude binaries are a fertile ground for further discoveries of multiple systems.

5 figures, submitted to AJ

References in corpus (9)

• Contact Binaries with Additional Components.I. The Extant Data
• Radial Velocity Studies of Close Binary Stars.VII. Methods and Uncertainties
• Absolute Magnitude Calibration for the W UMa-type Systems Based on Hipparcos Data
• A Fast Algorithm for Cosmic Rays Removal from Single Images
• Contact binaries with additional components. III. The adaptive optics detections
• Radial Velocity Studies of Close Binary Stars. XI
• Radial Velocity Studies of Close Binary Stars. XII
• Radial Velocity Studies of Close Binary Stars.XIII
• The shortest period field contact binary

Cited by in corpus (21)

• Speckle interferometry at the Blanco and SOAR telescopes in 2008 and 2009
• Planet Hunters: A Transiting Circumbinary Planet in a Quadruple Star System
• The most plausible explanation of the cyclical period changes in close binaries: the case of the RS CVn-type binary WW Dra
• Photometric study and absolute parameters estimation of six totally eclipsing contact binaries
• Physical parameters of 62 eclipsing binary stars using the ASAS-3 data$-$I
• Physical Properties and Evolutionary States of EA-type Eclipsing Binaries Observed by LAMOST
• Multiplicity of Galactic Cepheids and RR Lyrae stars from Gaia DR2 - I. Binarity from proper motion anomaly
• Dynamics of Quadruple Systems Composed of Two Binaries: Stars, White Dwarfs, and Implications for Ia Supernovae
• On the minimum mass ratio of W UMa binaries
• Ultrashort-period MS eclipsing systems. New observations and light curve solutions of six NSVS binaries
• Physical parameters of close binaries QX Andromedae, RW Comae Berenices, MR Delphini, and BD +07{\circ} 3142
• Physical parameters of close binary systems: VIII
• Starspots in contact and semi-detached binary systems
• Spectroscopic metallicity determinations for W~UMa-type binary stars
• The energy transfer and its effects on the secondaries in W Ursae Majoris-type contact binaries
• Comparative study of TESS photometry and radial velocities on six early K-type contact binaries with similar periods around 0.268 days
• NSVS 2569022: a peculiar binary among the W UMa stars with extremely small mass ratios
• Light curve solutions of the ultrashort-period $Kepler$ binaries
• A Multicolour Photometric Study of the neglected eclipsing binary FT Ursae Majoris
• Light curve solutions of six eclipsing binaries at the lower limit of periods of the W UMa stars
• Commissioning an Inexpensive Off-the-shelf Spectrograph for Radial-Velocity Studies