J/AJ/138/1622ivo://CDS.VizieR/J/AJ/138/1622doi:10.26093/cds/vizier.51381622CDSTorres G.Lacy C.H.S.Claret A.2017-06-01T08:53:09Z2012-02-16T08:51:58ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryradial-velocitymultiple-starsWe report extensive spectroscopic and differential V-band photometric observations of the 18.4 day detached double-lined eclipsing binary LV Her (F9V), which has the highest eccentricity (e~0.613) among the systems with well-measured properties. We determine the absolute masses and radii of the components to be M1=1.193+/-0.010M_{sun}_, M2=1.1698+/-0.0081M_{sun}_, R1=1.358+/-0.012R_{sun}_, and R2=1.313+/-0.011R_{sun}_, with fractional errors of 0.9% or better. The effective temperatures are 6060+/-150K and 6030+/-150K, respectively, and the overall metallicity is estimated to be [m/H]=+0.08+/-0.21. A comparison with current stellar evolution models for this composition indicates an excellent fit for an age between 3.8 and 4.2Gyr, with both stars being near the middle of their main-sequence lifetimes. Full integration of the equations for tidal evolution is consistent with the high eccentricity, and suggests that the stars' spin axes are aligned with the orbital axis, and that their rotations should be pseudo-synchronized. The latter prediction is not quite in agreement with the measured projected rotational velocities.2009AJ....138.1622Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1622CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2012)B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2011)B/mk : Catalogue of Stellar Spectral Classifications (Skiff, 2010)V/124 : Approximate elements of eclipsing binaries (Svechnikov+, 1990)J/other/IBVS/5830 : Minima and maxima of 292 variables (Hubscher+, 2008)J/MNRAS/378/179 : Eclipsing Binary with Eccentric Orbits Catalog (Bulut+,J/A+A/417/263 : Catalogue of Algol type binary stars (Budding+, 2004)http://var2.astro.cz/EN/brno/eclipsing_binaries.php : Variable Star andhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/138/1622https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/138/1622http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/138/1622https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/138/1622https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/138/1622http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/138/1622GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/138/1622/table1*URSA differential V-band magnitudes of LV HerrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleVmagDifferential V-band magnitudemagphot.mag;em.opt.VfloatPhaseOrbital phasetime.phasedoubleJ/AJ/138/1622/table2*NFO differential V-band magnitudes of LV HerrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleVmagDifferential V-band magnitudemagphot.mag;em.opt.VfloatPhaseOrbital phasetime.phasedoubleJ/AJ/138/1622/table4Times of eclipse for LV HerrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoublee_HJDUncertainty in HJDdstat.error;time.epochdoubleDateUT date in decimal yearyrtime.epochdoubleType[1/2] 1: Primary or 2: Secondarymeta.code.multipintInstIntrumentation: ccd, pg (photographic), or vis (visual)meta.notecharO-CFit residualdstat.fit.residual;stat.fit.param;meta.modelleddoubleRefReference (2)meta.ref;pos.frameintf_Ref[*] *: Remeasurementmeta.codecharJ/AJ/138/1622/table5Radial velocity measurements of LV HerrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleRV1Radial velocity of primary component (1)km/sspect.dopplerVelocfloatRV2Radial velocity of secondary component (1)km/sspect.dopplerVelocfloate_RV1RV1 uncertaintykm/sstat.errorfloate_RV2RV2 uncertaintykm/sstat.errorfloat(O-C)1Fit residual of primary componentkm/sstat.fit.residual;stat.fit.param;meta.modelledfloat(O-C)2Fit residual of secondary componentkm/sstat.fit.residual;stat.fit.param;meta.modelledfloatPhasePhasetime.phasefloat