J/ApJ/746/101ivo://CDS.VizieR/J/ApJ/746/101doi:10.26093/cds/vizier.17460101CDSBoyajian T.S.McAlister H.A.van Belle G.Gies D.R.,ten Brummelaar T.A.von Braun K.Farrington C.Goldfinger P.J.,O'Brien D.Parks J.R.Richardson N.D.Ridgway S.Schaefer G.,Sturmann L.Sturmann J.Touhami Y.Turner N.H.White R.2017-07-12T15:03:50Z2013-09-26T10:35:30ZCDS support team

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

cds-question@unistra.frstellar-radiiinterferometryinfrared-sourcesphotometryeffective-temperatureWe have executed a survey of nearby, main-sequence A-, F-, and G-type stars with the CHARA Array, successfully measuring the angular diameters of forty-four stars with an average precision of ~1.5%. We present new measures of the bolometric flux, which in turn leads to an empirical determination of the effective temperature for the stars observed. In addition, these CHARA-determined temperatures, radii, and luminosities are fit to Yonsei-Yale model isochrones to constrain the masses and ages of the stars. These results are compared to indirect estimates of these quantities obtained by collecting photometry of the stars and applying them to model atmospheres and evolutionary isochrones. We find that for most cases, the models overestimate the effective temperature by ~1.5%-4% when compared to our directly measured values. The overestimated temperatures and underestimated radii in these works appear to cause an additional offset in the star's surface gravity measurements, which consequently yield higher masses and younger ages, in particular for stars with masses greater than ~1.3 M_{sun}_. Additionally, we compare our measurements to a large sample of eclipsing binary stars, and excellent agreement is seen within both data sets. Finally, we present temperature relations with respect to (B-V) and (V-K) colors as well as spectral type, showing that calibration of effective temperatures with errors ~1% is now possible from interferometric angular diameters of stars.2012ApJ...746..101Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/746/101CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)IV/27 : HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)J/ApJ/683/424 : CHARA observations of 3 late-type stars (Boyajian+, 2008)J/ApJS/168/297 : Stellar parameters of nearby cool stars (Takeda+, 2007)J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)J/PASJ/57/27 : Atmospheric parameters of nearby F-K stars (Takeda+, 2005)J/ApJ/626/446 : Effective temperature scale of FGK stars (Ramirez+, 2005)J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)J/AJ/121/2159 : Basic parameters for 372 A, F + G stars (Gray+, 2001)J/AJ/121/2148 : Precise spectral types for 372 A, F + G stars (Gray+, 2001)J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000{AA} (Pickles 1998)J/A+AS/110/553 : Teff for B, A and F main sequence stars (Sokolov, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/746/101https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/746/101http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/746/101https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/746/101https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/746/101http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/746/101GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/746/101/targets (Parameters of the target (tables 1, 5, 9, 10 and 12))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/746/101/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/746/101/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/746/101/targets?GETtext/xml+votable180.050000true12.276208357.81518610.0055555555555555566/1341 2923 3020 3036 3102 3118 3639 5304 5670 6066 6082 6339 7238 7560 8476 8790 9125 10375 10899 11403 11732 14126 15170 16069 19323 19329 19585 22511 23190 23230 23369 23820 24151 26024 26975 28352 28605 28664 29680 30655 30665 30878 31448 32192https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/746/101?format=asciiInfraredOpticaldefaultJ/ApJ/746/101/table8*Target photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDObject HD identifiermeta.id;meta.mainintPhotSystem or band wavelength (1030-3500[nm], Geneva, Johnson or Stromgren) (1)nmmeta.id;photcharBandFilter or bandwidth (206-700nm, B, B1, B2, G or H) (1)instr.bandpasscharmag[0.37/53.2] Observed magnitude in Band (1)magphot.magfloate_mag[0.04/5.32] Error in mag (1)magstat.error;phot.magfloatAutAuthor's name for the referencemeta.bib.authorcharBibCodeBibcode or complete referencemeta.bib.bibcodecharJ/ApJ/746/101/targetsParameters of the target (tables 1, 5, 9, 10 and 12)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD numbermeta.id;meta.mainintprimaryHRHR numbermeta.idintHIPHIP numbermeta.idintONameOther name (1)meta.idcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainSpTMK spectral type (2)src.spTypecharSpT2SIMBAD MK spectral typesrc.spTypecharVmag[2.34,6.42] V-band magnitudemagphot.mag;em.opt.VfloatKmag[2.02,4.38] K-band magnitudemagphot.mag;em.IR.Kfloat(B-V)[0.014,0.804] B-V color indexmagphot.color;em.opt.B;em.opt.Vfloat[Fe/H][-1.36,0.33]? Metallicity (3)log(Sun)phys.abund.ZfloatnullablePlx[31.8,173.77] Parallax from van Leeuwen (2007, Cat. I/311)maspos.parallaxfloate_Plx[0.12,0.85] Parallax uncertaintymasstat.error;pos.parallaxfloatNobs[8,42] Number of observationsmeta.numberintchi2[0.08,2.23] Reduced {chi}^2^stat.fit.chi2floatD(UD)[0.6,1.6] Uniform disk diameter {theta}_UD_masphys.angSizefloate_D(UD)[0.004,0.03] D(UD) uncertaintymasstat.errorfloatmuK[0.17,0.32] Limb-darkening coefficient {mu}_K_phot.limbDarkfloatD(LD)[0.6,1.7] Limb-darkened diameter {theta}_LD_masphys.angSizefloate_D(LD)[0.004,0.03] D(LD) uncertaintymasstat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharSpT3Template MK spectral type (4)src.spTypecharNph[69,279] Number of photometry pointsmeta.numberintchi2P[0.25,3.85] Reduced {chi}^2^stat.fit.chi2floatFbol[8.27,339.9] Integrated bolometric flux in units of 10^-8^erg/s/cm^2^pW.m**-2phot.flux.bolfloate_Fbol[0.08,7.05] Fbol uncertainty1e-11W.m**-2stat.errorfloatAv[0,0.062] Extinctionmagphys.absorptionfloate_Av[0.008,0.023] Av uncertaintymagstat.errorfloatR[0.681,3.021] Stellar radiussolRadphys.size.radiusfloate_R[0.004,0.083] R uncertaintysolRadstat.errorfloatL[0.212,63.015] Stellar luminositysolLumphys.luminosityfloate_L[0.002,1.307] L uncertaintysolLumstat.errorfloatTeff[4759,9377] Effective temperatureKphys.temperature.effectiveinte_Teff[19,167] Teff uncertaintyKstat.error;phys.temperature.effectiveintM[0.852,2.209] Stellar masssolMassphys.massfloatnullablee_M[0.005,0.095] M uncertaintysolMassstat.errorfloatnullableAge[0.2,14.9] Stellar ageGyrtime.agefloatnullablee_Age[0,3.1] Age uncertaintyGyrstat.error;time.agefloatnullable