Radial Velocity Studies of Close Binary Stars.V

Abstract

Radial-velocity measurements and sine-curve fits to the orbital velocity variations are presented for the fifth set of ten close binary systems: V376 And, EL Aqr, EF Boo, DN Cam, FN Cam, V776 Cas, SX Crv, V351 Peg, EQ Tau, KZ Vir. All systems are double-lined spectroscopic contact binaries (KZ Vir may be a low inclination, close, non-contact binary), with seven (all except EL Aqr, SX Crv and EQ Tau) being the recent photometric discoveries of the Hipparcos satellite project. The most interesting object is SX Crv, a contact system with an unprecedently low mass ratio, q=0.066+/-0.003, whose existence challenges the current theory of tidal stability of contact systems. Several of the studied systems are prime candidates for combined light and radial-velocity synthesis solutions.

aastex5.0, 3 figures in PS; submitted to Astron.J

References in corpus (1)

• Radial Velocity Studies of Close Binary Stars.IV

Cited by in corpus (28)

• Radial Velocity Studies of Close Binary Stars.VII. Methods and Uncertainties
• Physical Properties and Catalogue of EW-type Eclipsing Binaries Observed by LAMOST
• Contact Binaries with Additional Components. II. A Spectroscopic Search for Faint Tertiaries
• Photometric study and absolute parameters estimation of six totally eclipsing contact binaries
• The dynamical stability of W Ursae Majoris-type systems
• A Catalog of 1022 Bright Contact Binary Stars
• Physical parameters of 62 eclipsing binary stars using the ASAS-3 data$-$I
• Kinematics of W UMa-type binaries and evidences on the two types of formation
• Radial Velocity Studies of Close Binary Stars.VIII
• Angular momentum and mass evolution of contact binaries
• Radial Velocity Studies of Close Binary Stars.VI
• Radial Velocity Studies of Close Binary Stars. XI
• Radial Velocity Studies of Close Binary Stars. IX
• The 7.5 Magnitude Limit Sample of Bright Short-Period Binary Stars. I. How Many Contact Binaries Are There?
• Physical parameters and multiplicity of five southern close eclipsing binaries
• Radial Velocity Studies of Close Binary Stars.X
• A Solar-type Stellar Companion to a Deep Contact Binary in a Quadruple System
• Contact binary stars of the W UMa type as distance tracers
• The study of eleven contact binaries with mass ratios less than 0.1
• Physical parameters of close binary systems: VIII
• Starspots in contact and semi-detached binary systems
• Spectroscopic metallicity determinations for W~UMa-type binary stars
• Radial Velocity Studies of Southern Close Binary Stars.I
• Assessment of evolutionary status of eclipsing binaries using light-curve parameters and spectral classification
• New absolute magnitude calibrations for W Ursa Majoris type binaries
• NSVS 2569022: a peculiar binary among the W UMa stars with extremely small mass ratios
• Chromospheric activity in bright contact binary stars
• Photometric and spectroscopic studies of the long period low mass ratio deep contact binary KN Per