J/ApJ/873/91ivo://CDS.VizieR/J/ApJ/873/91doi:10.26093/cds/vizier.18730091CDSGordon K.D.Gies D.R.Schaefer G.H.Huber D.Ireland M.2021-09-07T13:41:23Z2020-08-25T13:27:44ZCDS support team

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

cds-question@unistra.frinterferometryb-starseffective-temperaturestellar-distancestellar-radiiinterstellar-reddeningWe present interferometric observations of 25 spectral type-B stars that were made with the Precision Astronomical Visible Observations and the CLassic Interferometry with Multiple Baselines beam combiners at the Center for High Angular Resolution Astronomy Array (CHARA). The observations provide the angular sizes of these stars with an average error of 6%. The stars range in size from 1.09mas for {beta} Tau down to 0.20mas for 32 Ori. We collected ultraviolet to infrared spectrophotometry and derived temperatures, angular diameters, and reddening estimates that best fit the spectra, as well as solutions with the angular size fixed by the interferometric measurements. There is generally good agreement between the observed and spectral fit angular diameters, indicating that the fluxes predicted from model atmospheres are reliable. On the other hand, the temperatures derived from angular diameters and fluxes tend to be larger (by ~4%) than those from published results based on analysis of the line spectrum. This discrepancy may in part be attributed to unexplored atmospheric parameters or the existence of unknown companions. The physical radii of the stars are calculated from the angular diameters and Gaia DR2 parallaxes, and the target stars are placed in the Hertzsprung-Russell diagram for comparison with evolutionary tracks.2019ApJ...873...91Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/873/91CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/pastel : The PASTEL catalogue (Soubiran+, 2016-)II/62 : Catalogue of Extinction Data (Neckel+, 1980)II/114 : UV Interstellar Extinction (Savage+ 1985)III/196 : NIR stellar spectra from 1.428 to 2.5 um (Lancon+ 1996)III/201 : Pulkovo Spectrophotometric Catalog (Alekseeva+ 1997)II/224 : Catalog of Stellar Diameters (CADARS) (Pasinetti-Fracassini+ 2001)III/218 : ELODIE archive (Prugniel+, 2001)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)III/232 : STELIB: A library of stellar spectra at R~2000 (Le Borgne+, 2003)III/244 : Catalog of Stellar Rotational Velocities (Glebocki+ 2005)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)II/346 : JMMC Stellar Diameters Catalogue - JSDC. Version 2 (Bourges+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/117/548 : 1997 WIYN binary stars speckle observations (Horch+, 1999)J/AJ/119/3084 : ICCD speckle obs. of binary stars. XXIII. (Hartkopf+, 2000)J/MNRAS/326/959 : Empirical calibration of the NIR Ca triplet (Cenarro+ 2001)J/ApJS/152/251 : Library of coude feed stellar spectra (Valdes+, 2004)J/AJ/129/1642 : Calibration of synthetic photometry (Fitzpatrick+, 2005)J/A+A/447/685 : Elemental abundance analyses. XXIX. (Adelman+, 2006)J/other/AstBu/62.339 : Speckle interferometry of nearby mult. (Balega+, 2007)J/MNRAS/374/664 : Stellar atmospheric param. in MILES library (Cenarro+, 2007)J/ApJ/683/424 : CHARA observations of 3 late-type stars (Boyajian+, 2008)J/MNRAS/399/2146 : Orbits of open clusters in the Galaxy (Wu+, 2009)J/A+A/501/297 : Effective temperatures of B Supergiants (Zorec+, 2009)J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)J/MNRAS/454/28 : Bayesian statistics for massive stars (Mugnes+, 2015)J/AJ/152/40 : Spectroscopy of bright A- & B-type stars (Gullikson+, 2016)J/AJ/152/213 : Interferometry & spectroscopy of sigma Ori (Schaefer+, 2016)J/AJ/153/16 : Calibrator stars for interferometers (Swihart+, 2017)J/AJ/155/30 : Fundamental param. of 87 stars from the NPOI (Baines+, 2018)J/ApJ/869/37 : Optical interferometry of 6 O-type HD stars (Gordon+, 2018)J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/873/91https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/873/91http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/873/91https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/873/91https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/873/91http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/873/91GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/873/91/bstars (Parameters of stars (Table 1) and observation and stellar parameters (Tables 5-8))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/873/91/bstars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/873/91/bstars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/873/91/bstars?GETtext/xml+votable180.050000true7.943163954.5222850.0055555555555555566/161 463 472 666 1040 2970 9680 9847 10731 11599 12865 14522 14777 15392 16144 17194 19309 20012 23005 24480 27102 30114 30229https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/873/91?format=asciidefaultJ/ApJ/873/91/bstarsParameters of stars (Table 1) and observation and stellar parameters (Tables 5-8)e_Dist2[0.2/86.7] Uncertainty in Dist2pcstat.errorfloate_TeffSED[0.3/1.3] Uncertainty in TeffSEDkKstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNvNumber of calibrated visibilities (link to Table 4)meta.numberintnullableSeq[1/25] Running sequence numbermeta.idintNameStar Namemeta.idHD[2772/222661] HD Numbermeta.id;meta.mainintprimarySpTSIMBAD spectral typesrc.spTypecharVmag[1.65/4.84] SIMBAD V band magnitudemagphot.mag;em.opt.VfloatB-V[-0.22/0.42] B-V color index from SIMBADmagphot.color;em.opt.B;em.opt.VfloatV-K[-0.73/1.11] V-K color index from SIMBADmagphot.color;em.opt;em.IRfloatTeff[10.0/26.8] Surface effective temperature (1)kKphys.temperature.effectivefloate_Teff[0.1/1.0] Uncertainty in TeffkKstat.error;phys.temperature.effectivefloatlogg[2.1/4.5] log, surface gravity (1)log(cm.s**-2)phys.gravityfloate_logg[0.03/0.25] Uncertainty in logglog(cm.s**-2)stat.errorfloatvsini[10/220] Projected rotational velocity (2)km/sphys.veloc.rotatintBeam[PC] CHARA Beam combiner, (P)AVO or (C)LIMBmeta.id;instrcharBlBaseline(s)instr.baselinecharNV2[6/312] Number of visibilities in calculationmeta.numberintThetaUD[0.19/1.1] Uniform disk diametermasphys.angSizefloate_ThetaUD[0.01/0.08] Uncertainty in ThetaUD (3)masstat.errorfloatmuR[0.2/0.4]? R-band linear limb darkening coefficientphot.limbDarkfloatnullablemuH[0.16/0.18]? H-band linear limb darkening coefficientphot.limbDarkfloatnullableThetaLD[0.2/1.1] Limb-darkened disk diametermasphys.angSizefloate_ThetaLD[0.01/0.08] Uncertainty in ThetaLD (3)masstat.errorfloatf_ThetaLDFlag on Theta-LD (G1)meta.codecharRatio[0.3/1.1] Maximum, Theta-cal / ThetaLD ratiostat.fit.omcfloatThetaLD1[0.2/1.09] Limb-darkened diameter, this workmasphys.angSizefloate_ThetaLD1[0.015/0.08] Uncertainty in ThetaLD1masstat.errorfloatf_ThetaLD1Flag on Theta-LD1 (G1)meta.codecharThetaLD2[0.09/1.16]? Limb-darkened diameter from JSDC V2 ( Bourges+ 2014, II/346)masphys.angSizefloatnullablee_ThetaLD2[0.003/0.1]? Uncertainty in ThetaLD2masstat.errorfloatnullableThetaLD3[0.3/1.1]? Limb-darkened diameter from Underhill+ (1979MNRAS.189..601U)masphys.angSizefloatnullablee_ThetaLD3[0.001/0.01]? Uncertainty in ThetaLD3masstat.errorfloatnullableThetaLD4[0.27/1.1] Limb-darkened diameter from CADARS (Pasinetti Fracassini+, 2011, II/224)masphys.angSizefloatThetaLD5[0.3/1]? Limb-darkened diameter from Swihart+ (2017, J/AJ/153/16)masphys.angSizefloatnullablee_ThetaLD5[0.013/0.15]? Uncertainty in ThetaLD5masstat.errorfloatnullableThetaLD6[0.2/1.2] Limb-darkened diameter from SED (4)masphys.angSizefloate_ThetaLD6[0.005/0.2] Uncertainty in ThetaLD6masstat.errorfloatTeff1[10/29.5]? Derived Teff, this work from Theta-LDkKphys.temperature.effectivefloatnullablee_Teff1[0.3/2.5]? Uncertainty in Teff1kKstat.errorfloatnullablef_Teff1Flag on Teff1 (G1)meta.codecharTeffSED[9.5/23.6] Teff derived from SEDkKphys.temperature.effectivefloatTeffLit[10/26.8] Literature TeffkKphys.temperature.effectivefloate_TeffLit[0.1/1] Uncertainty in TeffLitkKstat.errorfloatE(B-V)1[0.007/0.7]? Best Fit E(B-V), this workmagphot.color.excessfloatnullablef_E(B-V)1Flag on E(B-V)1 (G1)meta.codecharE(B-V)Lit[0.01/0.6] Literature E(B-V) (5)magphot.color.excessfloatDist1[37/1072]? Literature distance from Underhill+ (1979MNRAS.189..601U)pcpos.distance;pos.heliocentricintnullableDist2[31.9/714.3] Literature distance from van Leeuwen (2007, I/311) and M Maiz Apellaniz+ (2008arXiv0804.2553M)pcpos.distance;pos.heliocentricfloatDist3[37.0/1177.0]? Gaia DR2 (I/345) distancepcpos.distance;pos.heliocentricfloatnullablee_Dist3[0.7/186.8]? Uncertainty in Dist2pcstat.errorfloatnullableRstar[1.82/56.7] Derived stellar radii (6)solRadphys.size.radiusfloate_Rstar[0.1/9.46] Uncertainty in RstarsolRadstat.errorfloatBin[*] *: stars with close companionsmeta.codecharf_RstarFlag on Rstar (G1)meta.codecharV2PV2 interactive plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/873/91/table4Calibrated visibilitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBeamCHARA Beam combiner, PAVO or CLIMBmeta.id;instrcharHD[2772/222661] HD Numbermeta.id;meta.mainintMJD[56214/57573] Modified Julian Date of observation (JD-2400000.5)dtime.epochintTelArray telescope pairinstr.telcharspatial[114.4/505.7] Frequency of the observation1e-06rad**-1em.freq;obsdoubleu[-2254/2252] u position of spatial frequencyarcsec**-1obs.paramdoublev[-2302/2126] v position of spatial frequencyarcsec**-1obs.paramdoubleB[140.7/330.7] Baselineminstr.baselinefloatV2[-5.61e-5/0.9] Visibility, squaredinstr.calibdoublee_V2[-0.002/0.4] Uncertainty in V2stat.errordoubleV2c[0.008/1]? Visibility, squared and corrected for companion fluxinstr.calibdoublenullablee_V2c[0.003/0.4]? Uncertainty in V2cstat.errordoublenullable