J/ApJ/683/424ivo://CDS.VizieR/J/ApJ/683/424doi:10.26093/cds/vizier.16830424CDSBoyajian T.S.McAlister H.A.Baines E.K.Gies D.R.Henry T.Jao W.-C.,O'Brien D.Raghavan D.Touhami Y.ten Brummelaar T.A.Farrington C.,Goldfinger P.J.Sturmann L.Sturmann J.Turner N.H.Ridgway S.2014-10-20T15:14:43Z2010-12-22T09:45:20ZCDS support team

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

cds-question@unistra.frlate-type-starsinterferometryUsing the longest baselines of the CHARA Array, we have measured the angular diameter of the G5V subdwarf {mu} Cas A, the first such determination for a halo population star. We compare this result to new diameters for the higher metallicity K0V stars, {sigma} Dra and HR 511, and find that the metal-poor star, {mu} Cas A, has an effective temperature (T_eff_=5297+/-32K), radius (R=0.791+/-0.008R_{sun}_), and absolute luminosity (L=0.442+/-0.014L_{sun}_) comparable to those of the other two stars with later spectral types. We show that stellar models show a discrepancy in the predicted temperature and radius for {mu} Cas A, and we discuss these results and how they provide a key to understanding the fundamental relationships for stars with low metallicity.2008ApJ...683..424Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/683/424CatalogResearchIsServedByTAP VizieR generic servicerelated-toVI/46 : Second Catalog of Interferometric Measurements of Binary Starshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/683/424https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/683/424http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/683/424https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/683/424https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/683/424http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/683/424GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/683/424/table1Interferometric measurementsVVisibility (1)phot.flux;arith.ratiofloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHRHR (Bright Star) number of starmeta.idintNameStar namemeta.id;meta.mainJDJulian Date of observationdtime.epochdoubleBProjected baselineminstr.baselinefloatpsiOrientation of the baseline on the skydegobs.paramfloate_VThe 1{sigma} error in Vstat.error;pos.cartesian.yfloat