J/ApJ/894/96ivo://CDS.VizieR/J/ApJ/894/96doi:10.26093/cds/vizier.18940096CDSTorres G.Lacy C.H.S.Fekel F.C.Muterspaugh M.W.2022-09-21T08:23:07Z2021-10-21T14:43:14ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryvisible-astronomyspectroscopyradial-velocityf-starsWe report extensive differential V-band photometry and high-resolution spectroscopy for the 1.14d, detached, double-lined eclipsing binary BT Vul (F0+F7). Our radial-velocity monitoring and light-curve analysis lead to absolute masses and radii of M1=1.5439+/-0.0098M_{sun}_^N^ and R1=1.536+/-0.018R_{sun}_^N^ for the primary, and M2=1.2196+/-0.0080M_{sun}_^N^ and R2=1.151+/-0.029R_{sun}_^N^ for the secondary. The effective temperatures are 7270+/-150K and 6260+/-180K, respectively. Both stars are rapid rotators, and the orbit is circular. A comparison with stellar evolution models from the MESA Isochrones and Stellar Tracks series shows excellent agreement with these determinations, for a composition of [Fe/H]=+0.08 and an age of 350Myr. The two components of BT Vul are very near the zero-age main sequence.2020ApJ...894...96Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/894/96CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)J/AJ/124/1144 : Orbits of single-lined sp. binaries (Latham, 2002)J/A+A/450/681 : Companions to close sp. binaries (Tokovinin+, 2006)J/AJ/138/1622 : Absolute properties of LV Her (Torres+, 2009)J/other/IBVS/5889 : Minima and maxima of 380 variables (Hubscher+, 2009)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)J/ApJ/742/123 : Photometry and Velocity of LSPM J1112+7626 (Irwin+, 2011)J/AJ/145/111 : RVs of five spectroscopic binaries (Fekel+, 2013)J/ApJS/208/9 : Colors & temperatures of PMS stars (Pecaut+, 2013)J/AN/334/860 : Cat. of eclipsing variables. V2 (Avvakumova+, 2013)J/AJ/147/36 : Photometry and spectroscopy of AQ Ser (Torres+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/894/96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/894/96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/894/96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/894/96https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/894/96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/894/96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/894/96/table1Times of Minimum Light for BT VulO-C[-0.025/0.026] Residualdstat.fit.residualdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[34740.28/58690.655] Heliocentric Julian Date, HJD-2400000 (1)dtime.epochdoubleYear[1953.99/2019.57] Fractional year, minimum lightyrphys.composition.massLightRatio;stat.mindoubleEpoch[-16421/4566] Epoch from reference time of primary minimum, cyclestime.epochdoubleUnc[0.00027/0.04] Uncertainty, days (2)dstat.errordoubleEcl[1/2] Eclipse type (3)meta.codeintTypeObservation type (4)meta.notecharJ/ApJ/894/96/table2CfA Radial Velocities for BT VulrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[55368.9/57297.7] Heliocentric Julian Date, HJD-2400000dtime.epochdoubleRV1[-152/107] Radial velocity, Primarykm/sspect.dopplerVelocfloatRV2[-186/141] Radial velocity, Secondarykm/sspect.dopplerVelocfloate_RV1[1.8/5.1] Uncertainty in RV1km/sstat.errorfloate_RV2[1.8/5.1] Uncertainty in RV2km/sstat.errorfloatPhase[0.18/0.84] Orbital Phase (1)time.phasedoubleJ/ApJ/894/96/table3Fairborn Radial Velocities for BT VulrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[55867.7/58376.65] Heliocentric Julian Date, HJD-2400000dtime.epochdoubleRV1[-152/108] Radial velocity, Primary (1)km/sspect.dopplerVelocfloatRV2[-183/142] Radial velocity, Secondary (1)km/sspect.dopplerVelocfloatPhase[0.08/0.92] Orbital Phase (2)time.phasedoubleJ/ApJ/894/96/table5URSA WebScope Observations of BT VulrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[52831.6/56600.7] Heliocentric Julian Date, HJD-2400000dtime.epochdoubledVmag[1.47/2.34] Magnitude difference, variable - comps (1)magphot.mag;arith.difffloatJ/ApJ/894/96/table6NFO WebScope Observations of BT VulrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[52831.6/56600.7] Heliocentric Julian Date, HJD-2400000dtime.epochdoubledVmag[1.47/2.34] Magnitude difference, variable - comps (1)magphot.mag;arith.difffloat