J/ApJ/858/71ivo://CDS.VizieR/J/ApJ/858/71doi:10.26093/cds/vizier.18580071CDSSchaefer G.H.White R.J.Baines E.K.Boyajian T.S.Brummelaar T.A.t.,Farrington C.D.Sturmann J.Sturmann L.Turner N.H.2019-05-13T08:05:51Z2019-05-06T09:40:37ZCDS support team

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

cds-question@unistra.frinterferometryinfrared-sourcesyoung-stellar-objectsWe present interferometric measurements obtained with the CHARA Array of 13 adolescent-age stars in nearby moving groups. The motivation was to spatially resolve the largest stars and to search for binary companions. Nine stars have diameters smaller than the resolution limit and no evidence for companions within 0.5-50mas and {Delta}H<2.0mag. The diameters of three stars were spatially resolved: GJ 159 (0.582+/-0.016mas) and GJ 393 (0.564+/-0.021mas) in the AB Dor moving group, and former member HD 89744 (0.556+/-0.032mas). Combining the angular diameters with their distances and bolometric fluxes, we measured radii and effective temperatures. The temperatures of GJ 159 (6286+/-123K) and GJ 393 (3515+/-68K) are consistent with spectroscopic measurements. Comparisons with evolutionary models show that HD 89744 has evolved off the main sequence. GJ 159 and GJ 393 lie within 1.5{sigma} of the zero-age main sequence, complicating their age estimates because it is unclear whether the stars are contracting or expanding. GJ 159 has a mass of 1.2+/-0.1M_{sun}_ with an age spanning 0.021-3.0Gyr. Its debris disk and lithium abundance favor a young age. GJ 393 has a mass of 0.42+/-0.03M_{sun}_ and a lower limit on its age 0.06Gyr. This overlaps with the age of the moving group; however, an older age would be more consistent with its slow rotation, low activity, and luminosity, suggesting that GJ 393 is a kinematic interloper.2018ApJ...858...71Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/858/71CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)III/119 : Spectral classifications of proper motion stars (Bidelman+ 1985)III/218 : ELODIE archive (Prugniel+, 2001)V/136 : Teff and metallicities for Tycho-2 stars (Ammons+, 2006)J/A+A/275/101 : Chemical evolution of the gal. disk I. (Edvardsson+ 1993)J/A+A/314/191 : Atmospheric param. in metal-poor stars. I (Gratton+, 1996)J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000AA (Pickles 1998)J/A+AS/141/491 : Chemical composition of halo and disk stars (Nissen+, 2000)J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)J/ApJ/593/1093 : IC 348 membership (Luhman+, 2003)J/A+A/415/1153 : [Fe/H] for 98 extra-solar planet-host stars (Santos+, 2004)J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)J/ApJ/626/446 : Effective temperature scale of FGK stars (Ramirez+, 2005)J/PASJ/57/27 : Atmospheric parameters of nearby F-K stars (Takeda+, 2005)J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)J/A+A/433/151 : Spectrosc. result on ROSAT late-type stars (Zickgraf+, 2005)J/A+A/450/735 : Effective temperatures and radii of stars (Masana+, 2006)J/A+A/446/267 : Stellar latitudinal differential rotation (Reiners+, 2006)J/MNRAS/378/1141 : Abundances in 31 stars with planet (Gonzalez+, 2007)J/AJ/134/1671 : Speckle interferometry at USNO. XIII (Mason+, 2007)J/ApJS/171/146 : Population synthesis in the blue. IV (Schiavon+, 2007)J/ApJS/172/663 : Infrared observations of the Pleiades (Stauffer+, 2007)J/ApJ/683/424 : CHARA observations of 3 late-type stars (Boyajian+, 2008)J/MNRAS/389/585 : Fundamental parameters of M dwarfs (Casagrande+, 2008)J/A+A/508/833 : SACY III. Li abundances (da Silva+, 2009)J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)J/A+A/493/1099 : CaIIHK emission in rapidly rotating stars (Schroeder+, 2009)J/MNRAS/403/1368 : Li abundances & vsini for star-planet syst (Gonzalez+, 2010)J/MNRAS/403/1949 : UBV(RcIc)JHK photometry of HIP nearby stars (Koen+, 2010)J/AJ/140/119 : {beta}Pic & AB Dor moving groups members (Schlieder+, 2010)J/other/A+ARV/18.67 : Accurate masses & radii of normal stars (Torres+, 2010)J/MNRAS/411/435 : Stellar parameters and extinction (Bailer-Jones, 2011)J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)J/AJ/141/90 : SEGUE stellar parameter pipeline. V. (Lee+, 2011)J/A+A/531/A165 : MILES atmospheric parameters (Prugniel+, 2011)J/ApJ/732/55 : Abundances of stars with planets (Schuler+, 2011)J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011)J/MNRAS/424/3178 : Pre-main-sequence isochrones. Pleiades (Bell+, 2012)J/ApJ/746/101 : Diameters and temperatures of AFG stars (Boyajian+, 2012)J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)J/AJ/143/134 : Cand. members of {beta} Pic/AB Dor groups (McCarthy+, 2012)J/ApJ/745/24 : A search for new companions with CHARA (Raghavan+, 2012)J/ApJ/756/46 : Lithium abundances in HIP stars (Ramirez+, 2012)J/A+A/553/A95 : PCA approach to stellar effective temp. (Bermejo+, 2013)J/A+A/549/A109 : HARPS XXXI. The M-dwarf sample (Bonfils+, 2013)J/ApJ/771/40 : Main-sequence A, F, G, K stars photometry (Boyajian+, 2013)J/A+A/552/A6 : Abundances of F-G stars (Gonzalez Hernandez+, 2013)J/AJ/145/102 : Bright M dwarfs spec. in the northern sky (Lepine+, 2013)J/ApJ/762/88 : Young stellar kinematic group cand. members (Malo+, 2013)J/ApJ/779/188 : Spectra of nearby late K and M Kepler stars (Mann+, 2013)J/A+A/557/A70 : Evolved planet hosts - stellar parameters (Mortier+, 2013)J/A+A/551/A36 : Metallicity of M dwarfs. III. (Neves+, 2013)J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)J/A+A/556/A15 : Effective temperature scale of M dwarfs (Rajpurohit+, 2013)J/MNRAS/435/952 : Lick indices for 51 stars (Sansom+, 2013)J/MNRAS/431/2063 : UV/X-ray activity of M dwarfs within 10pc (Stelzer+, 2013)J/A+A/568/A26 : SACY. V. Multiple systems (Elliott+, 2014)J/ApJ/791/54 : Nearby M Dwarfs parameters (Gaidos+, 2014)J/AJ/147/20 : Spectroscopy of 447 nearby M dwarfs (Newton+, 2014)J/MNRAS/454/593 : Young moving groups in solar neighbourhood (Bell+, 2015)J/A+A/577/A132 : Stellar parameters of early M dwarfs (Maldonado+, 2015)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/ApJ/800/85 : Teff, radii and luminosities of cool dwarfs (Newton+, 2015)J/ApJS/220/16 : SpeX NIR survey of 886 nearby M dwarfs (Terrien+, 2015)J/A+A/585/A5 : Exoplanet host/field stars age consistency (Bonfanti+, 2016)J/A+A/586/A94 : Exoplanetary parameters for 18 bright stars (Ligi+, 2016)J/AJ/153/95 : Catalog of Suspected Nearby Young Stars (Riedel+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/858/71https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/858/71http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/858/71https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/858/71https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/858/71http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/858/71GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/858/71/table1 (Observed stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/858/71/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/858/71/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/858/71/table1?GETtext/xml+votable180.050000true4.5870430.95614670.0055555555555555566/719 765 1762 5718 12770 20327 23140 23176 23895 26133 27392 31104https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/858/71?format=asciiInfrareddefaultJ/ApJ/858/71/table1Observed starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNobsNumber of observations for this star (link to Table 3)meta.numberintnullableNameStar name (as used in Table 3)meta.id;meta.maincharprimaryONameOther namemeta.idcharHDHD numbermeta.idcharHIP[10272/106231]? HIP numbermeta.idintnullableGroupMoving group identificationmeta.idcharf_Group[n] n: the star is no longer considered to be a membermeta.codecharSpTMK spectral type (1)src.spTypecharu_SpT[*] Uncertainty flag on SpT (2)meta.code.errorcharDist[7/49.2] Distance (3)pcpos.distance;pos.heliocentricfloate_Dist[0.1/4.4]? Dist uncertainty (3)pcstat.errorfloatnullableVmag[5.3/10.3]? V-band magnitude (4)magphot.mag;em.opt.Vfloatnullableu_Vmag[*] Uncertainty flag on Vmag (2)meta.code.errorcharKsmag[4/7] 2MASS Ks band magnitudephot.mag;em.IR.Kfloatu_Ksmag[*] Uncertainty flag on Ksmag (2)meta.code.errorcharSCatDisplay data from McCarthy & White, 2012, J/AJ/143/134 and Zuckerman & Song, 2004, J/other/ARA+A/42.685 within 3"meta.ref.urlintnullableTYC2Display the Tycho-2 Catalog (Hog+ 2000, I/259) within 3"meta.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/858/71/table3CHARA-classic observations of young stars in AB Dorf_VisVisibility flag (1)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharDateUT date of the observationtime.epoch;obsnullableMJD[54418.4/55293.5] Observation date; modified Julian Datedtime.epochdoubleBaselineBaseline descriptionmeta.note;instr.baselinecharlambda[1.6/2.2] Wavelength observedumem.wlfloatu[-95.1/125] u Coordinate; 10^6^cycles/radian1e+06rad**-1obs.paramfloatv[-86/194] v Coordinate; 10^6^cycles/radian1e+06rad**-1obs.paramfloatEBL[207/331] Effective baseline lengthminstr.baselinefloatVis[0.6/1.3] Visibilityobs.paramfloate_Vis[0.01/0.4] Uncertainty in Visibilitystat.errorfloat