J/ApJ/709/535ivo://CDS.VizieR/J/ApJ/709/535doi:10.26093/cds/vizier.17090535CDSBrown T.M.2017-09-22T12:03:23Z2012-03-29T11:03:35ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsastronomical-modelssolar-system-planetsstellar-massesstellar-radiimultiple-starsThe currently favored method for estimating radii and other parameters of transiting-planet host stars is to match theoretical models to observations of the stellar mean density {rho}_*_, the effective temperature T_eff_, and the composition parameter [Z]. This explicitly model-dependent approach is based on readily available observations, and results in small formal errors. Its performance will be central to the reliability of results from ground-based transit surveys such as TrES, HAT, and SuperWASP, as well as to the space-borne missions MOST, CoRoT, and Kepler. Here, I use two calibration samples of stars (eclipsing binaries (EBs) and stars for which asteroseismic analyses are available) having well-determined masses and radii to estimate the accuracy and systematic errors inherent in the {rho}_*_ method. When matching to the Yonsei-Yale stellar evolution models, I find the most important systematic error results from selection bias favoring rapidly rotating (hence probably magnetically active) stars among the EB sample. If unaccounted for, this bias leads to a mass-dependent underestimate of stellar radii by as much as 4% for stars of 0.4M_{sun}_, decreasing to zero for masses above about 1.4M_{sun}_. Relative errors in estimated stellar masses are three times larger than those in radii.2010ApJ...709..535Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/709/535CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/121 : Catalog of DMS-type eclipsing binaries (Svechnikov+, 1999)V/118 : Catalog of eclipsing binaries parameters (Perevozkina+, 1999)J/A+A/526/A99 : Metal-poor solar-type stars spectroscopy and massesJ/A+A/527/A140 : Mass limits on substellar companions (Reffert+, 2011)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/ApJ/709/535 : Masses and radii of planet hosts (Brown, 2010)J/ApJ/694/1085 : Radii of exoplanet host stars (van Belle+, 2009)http://www.astro.yale.edu/demarque/yystar.html : Y^2^ (Yonsei-Yale) stellarhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/709/535https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/709/535http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/709/535https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/709/535https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/709/535http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/709/535GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/709/535/table1 (*Eclipsing binary stars with accurate mass and radius estimates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/709/535/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/709/535/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/709/535/table1?GETtext/xml+votable180.050000true259.13215081.21055310.0055555555555555566/1344 1397 1753 3049 3097 3238 3383 3712 3830 4037 4078 4708 6340 6429 6669 6783 7454 8081 8917 9084 9857 12372 12911 13228 13263 13705 13819 14130 14179 14276 14308 14442 14575 14599 15137 15195 15415 15669 15803 16226 18309 18468 20853 21394 21438 21526 21732 21866 22872 22980 24256 24415 25098 25991 28687 28711 31169 31227 31838 31977 32217 32788 33027 33098 34914 35055 35862 36936 37012 37592 40279 40545 40826 40891 41715 41763 42674 42791 43282 44795https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/709/535?format=asciidefaultJ/ApJ/709/535/table1*Eclipsing binary stars with accurate mass and radius estimatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (binary name and component)meta.id;meta.maincharMassMass of the starsolMassphys.massfloate_Massrms on MasssolMassstat.error;phys.massfloatRadRadius of the starsolRadphys.size.radiusfloate_Radrms on RadsolRadstat.errorfloatTeffEffective temperatureKphys.temperature.effectiveinte_Teffrms on TeffKstat.error;phys.temperature.effectiveint[Z]? Logarithmic metal abundance relative to solarlog(Sun)phys.abund.Zfloatnullablee_[Z]? rms uncertainty on [Z]log(Sun)stat.error;src.redshiftfloatnullableMfitMass estimated by fit (1)solMassphys.massfloatRfitRadius estimated by fit (1)solRadphys.size.radius;meta.modelledfloatAgefitAge estimated by fit (1)Gyrtime.age;meta.modelledfloat_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main