J/AJ/166/29ivo://CDS.VizieR/J/AJ/166/29doi:10.26093/cds/vizier.51660029CDSLam R.Sandquist E.L.Schaefer G.H.Farrington C.D.Monnier J.D.,Anugu N.Lanthermann C.Klement R.Ennis J.Setterholm B.R.,Gardner T.Kraus S.Davies C.L.Orosz J.A.2024-11-06T20:18:35Z2024-02-23T07:42:32ZCDS support team

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

cds-question@unistra.frmultiple-starsvisible-astronomyspectroscopyinfrared-astronomyradial-velocityphotometryastrometryWe present measurements of the interferometrically resolved binary star system 12Com and the single giant star 31 Com in the cluster Coma Berenices. 12Com is a double-lined spectroscopic binary system consisting of a G7 giant and an A3 dwarf at the cluster turnoff. Using an extensive radial velocity data set and interferometric measurements from the Palomar Testbed Interferometer and the Center for High Angular Resolution Astronomy array, we measured masses M1=2.64{+/-}0.07M{sun} and M2=2.10{+/-}0.03M{sun}. Interferometry also allows us to resolve the giant and measure its size as R1=9.12{+/-}0.12{+/-}0.01R{sun}. With the measured masses and radii, we find an age of 533{+/-}41{+/-}42Myr. For comparison, we measure the radius of 31Com to be 8.36{+/-}0.15R{sun}. Based on the photometry and radius measurements, 12ComA is likely the most evolved bright star in the cluster, large enough to be in the red giant phase, but too small to have core helium burning. Simultaneous knowledge of 12ComA's mass and photometry puts strong constraints on convective core overshooting during the main-sequence phase, which in turn reduces systematic uncertainties in the age. Increased precision in measuring this system also improves our knowledge of the progenitor of the cluster white dwarf WD1216+260.2023AJ....166...29Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/29CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/pollux : POLLUX database of synthetic stellar spectra (Palacios+ 2010-2021)II/84 : 13-color photometry of 1380 bright stars (Johnson+ 1975)III/150 : Perkins Revised MK Types for the Cooler Stars (Keenan+ 1989)I/259 : The Tycho-2 Catalogue (Hog+ 2000)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/AJ/114/699 : Spectrophotometry in open clusters (Clampitt+ 1997)J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)J/ApJ/521/682 : Binaries in the Praesepe and Coma clusters (Abt+, 1999)J/MNRAS/365/447 : Stellar members of Coma Berenices cluster (Casewell+, 2006)J/AJ/135/209 : Rotational & radial velocities HIP giants (Massarotti+, 2008)J/A+A/491/951 : Positions and cross-references in Coma Ber (Mermilliod+ 2008)J/A+A/520/A52 : 31 Com radial velocities (Strassmeier+, 2010)J/A+A/580/A23 : Stroemgren-Crawford uvby{beta} photometry (Paunzen, 2015)J/AJ/152/213 : Interferometry & spectroscopy sigma Orionis (Schaefer+, 2016)J/A+A/624/L11 : Coma Berenices neighbor moving group (Fuernkranz+, 2019)J/ApJ/877/12 : Coma Ber & a Neighbor Stellar Group tidal tails (Tang+, 2019)J/A+A/649/A6 : Gaia Catalogue of Nearby Stars (Gaia collaboration, 2021)J/ApJ/917/11 : Metallicities of Coma Berenices bona fide (Souto+, 2021)J/AJ/164/184 : ARMADA. II. Binaries astrometry & RVel (Gardner+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/29https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/166/29/table1New radial velocity measures for 12 ComrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[51888/52041] Barycentric Julian Date of observation, BJD-2400000dtime.epochdoubleRVelA[-20.4/22.26] Radial velocity, heliocentrically-corrected, component Akm/sspect.dopplerVelocfloate_RVelA[0.21/0.22] Uncertainty in RVelAkm/sstat.errorfloatRVelB[-30.7/18.22] Radial velocity, heliocentrically-corrected, component Bkm/sspect.dopplerVelocfloate_RVelB[1.26/2.63] Uncertainty in RVelBkm/sstat.errorfloatJ/AJ/166/29/table3Visibilities for 12 ComrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[53127/59366] Heliocentric Julian Date of observation, HJD-2400000dtime.epochdoublelambda[1.48/2.23] wavelengthumem.wlfloate_lambda[0.007/0.4] wavelength uncertaintyumstat.errorfloatv2[0.001/1.15] Observable (squared) visibilityobs.paramdoublee_v2[0.001/0.16] Visibility uncertaintystat.errordoubleu[-245/300] baselineminstr.baselinedoublev[-273/312] baselineminstr.baselinedoubleConfConfigurationphys.atmol.configuration;instr.setupcharJ/AJ/166/29/table4Closure phases for 12 ComrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[59012/59366] Heliocentric Julian Date of observation, HJD-2400000dtime.epochdoublelambda[1.48/1.73] wavelengthumem.wlfloate_lambda[0.007/0.04] wavelength uncertaintyumstat.errorfloatphi[-84.6/94.7] orientation angle error ellipsedegstat.error;instrfloate_phi[0.8/53] Uncertainty in phidegstat.errorfloatu1[-218/300] baselineminstr.baselinedoublev1[-14.1/312] baselineminstr.baselinedoubleu2[-245/108] baselineminstr.baselinedoublev2[-273/211] baselineminstr.baselinedoubleConfConfigurationphys.atmol.configuration;instr.setupcharJ/AJ/166/29/table6Fitted positions for 12 ComrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsUT Date, numeric monthtime.epochHJD[59012/59366] Heliocentric Julian Date of observation, HJD-2400000dtime.epochdoublerho[13.4/17.5] angular separationmaspos.angDistancefloattheta[6.5/351] position angle of separation vector, East of Northdegpos.posAngfloateMaj[0.06/0.09] major axis size of error ellipse ({sigma}Maj)masphys.angSize.smajAxis;pos.errorEllipsefloateMin[0.01/0.06] minor axis size of error ellipse ({sigma}Min)masphys.angSize;pos.errorEllipsefloatphi[37.2/112] orientation angle of error ellipsestat.error;instrfloatJ/AJ/166/29/table8Photometry of 31 Com and 12 ComF12[2e-16/6e-11]? Flux density, at lambda-eff, 12 Com, erg/s/cm2/A1e+07W.m**-3phot.flux.densitydoublenullableRef[1/15] References (1)meta.refintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFiltFilter namephot.flux.densitycharlambda[1565/220883] Effective central wavelength of observation0.1nmem.wl.effective;obsintomag31[2.7/10.1]? Observed magnitude in Filter for 31 Commagphot.magfloatnullablee_omag31[0.003/0.9]? Uncertainty in omag31magstat.errorfloatnullableF31[2e-16/5e-11]? Flux density, at lambda, 31 Com, erg/s/cm2/A1e+07W.m**-3phot.flux.densitydoublenullableomag12[2.47/7.35]? Observed magnitude in Filter for 12 Commagphot.magfloatnullablee_omag12[0.003/0.3]? Uncertainty in omag12magstat.errorfloatnullable