J/ApJ/876/41ivo://CDS.VizieR/J/ApJ/876/41doi:10.26093/cds/vizier.18760041CDSTorres G.Sandberg Lacy C.H.Fekel F.C.Muterspaugh M.W.2021-09-09T07:14:24Z2020-10-27T10:36:17ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starsradial-velocityvisible-astronomyspectroscopyphotometryWe report extensive differential V-band photometry and high-resolution spectroscopic observations of the early F-type, 1.06-day detached eclipsing binary V506 Oph. The observations, along with times of minimum light from the literature, are used to derive a very precise ephemeris and the physical properties for the components, with the absolute masses and radii being determined to 0.7% or better. The masses are 1.4153+/-0.0100M_{sun}_ and 1.4023+/-0.0094M_{sun}_ for the primary and secondary, the radii are 1.725+/-0.010R_{sun}_ and 1.692+/-0.012R_{sun}_, and the effective temperatures are 6840+/-150K and 6780+/-110K, respectively. The orbit is circular and the stars are rotating synchronously. The accuracy of the radii and temperatures is supported by the resulting distance estimate of 564+/-30pc, which is in excellent agreement with the value implied by the trigonometric parallax listed in the Gaia/Data Release 2 catalog. Current stellar evolution models from the Modules for Experiments in Stellar Astrophysics (MESA) Isochrones and Stellar Tracks series for a composition of [Fe/H]=-0.04 match the properties of both stars in V506 Oph very well at an age of 1.83Gyr and indicate they are halfway through their core hydrogen-burning phase.2019ApJ...876...41Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/876/41CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/271 : TASS Mark IV patches photometric catalog, version 2 (Droege+, 2007)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)J/AJ/124/1144 : Orbits of 171 single-lined spectrosc. binaries (Latham, 2002)J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/AJ/145/111 : Radial velocities of 5 spectroscopic binaries (Fekel+, 2013)J/AJ/147/148 : Spectroscopy and photometry of AP And (Lacy+, 2014)J/A+A/615/A49 : TGAS stars membership in open clusters (Cantat-Gaudin+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/876/41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/876/41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/876/41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/876/41https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/876/41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/876/41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/876/41/table1Heliocentric radial velocity measurements of V506 Oph from CfAPhase[0.0139/0.984] Orbital phase (G1)time.phasefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[55338.8/57807.1] Heliocentric Julian Date; HJD-2400000dtime.epochdoubleRV1[-155/144] Radial velocitykm/sspect.dopplerVelocfloate_RV1[1.8/4.8] Error on radial velocitykm/sstat.errorfloatRV2[-149/149] Radial velocitykm/sspect.dopplerVelocfloate_RV2[1.9/5.1] Error on radial velocitykm/sstat.errorfloatJ/ApJ/876/41/table2Heliocentric radial velocity measurements of V506 Oph from the Fairborn observatoryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[55976.9/58245.9] Heliocentric Julian Datedtime.epochdoubleRV1[-150/146] Radial velocity for the primary (1)km/sspect.dopplerVelocfloatRV2[-149.7/145.2] Radial velocity for the secondary (1)km/sspect.dopplerVelocfloatPhase[0.118/0.838] Orbital phase (G1)time.phasefloatJ/ApJ/876/41/table3Times of minimum light for V506 OphrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[25502.3/57237.8] Heliocentric Julian Date; HJD-2400000dtime.epochdoublee_HJD[7e-5/0.006]? 1{sigma} uncertainty in HJD (1)dstat.error;time.epochdoublenullableEcl[1/2] Eclipse type (1=primary; 2=secondary)meta.codeintObsObservation type (2)meta.notecharYear[1928.699/2015.586] Observation yearyrtimedoubleO-C[-0.063/0.031] The (O-C) valuemagstat.fit.residualdoubleRef[1/4] Source code (3)meta.codeintJ/ApJ/876/41/table5URSA observations of V506 OphrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date; HJD-2400000dtime.epochdoubleDelVmag[0.7/1.7] Differential V band magnitudemagphot.mag;arith.diff;em.opt.VfloatJ/ApJ/876/41/table6NFO observations of V506 OphrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date; HJD-2400000dtime.epochdoubleDelVmag[0.7/1.7] Differential V band magnitudemagphot.mag;arith.diff;em.opt.Vfloat