J/A+A/531/A89ivo://CDS.VizieR/J/A+A/531/A89doi:10.26093/cds/vizier.35310089CDSWeber M.Strassmeier K.G.2017-06-26T11:49:06Z2011-06-20T09:08:55ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsradial-velocityCapella is among the few binary stars with two evolved giant components. The hotter component is a chromospherically active star within the Hertzsprung gap, while the cooler star is possibly helium-core burning. The known inclination of the orbital plane from astrometry in combination with precise radial velocities will allow very accurate masses to be determined for the individual Capella stars. This will constrain their evolutionary stage and possibly the role of the active star's magnetic field on the dynamical evolution of the binary system. We obtained a total of 438 high-resolution echelle spectra during the years 2007-2010 and used the measured velocities to recompute the orbital elements. Our double-lined orbital solution yields average residuals of 64m/s for the cool component and 297m/s for the more rapidly rotating hotter component.2011A&A...531A..89Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/531/A89CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/531/A89https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/531/A89http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/531/A89https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/531/A89https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/531/A89http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/531/A89GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/531/A89/table1Barycentric STELLA radial velocities of CapellarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Datedtime.epochdoubleRVABarycentric radial velocity of component Akm/sphys.veloc;pos.barycenterfloate_RVAInternal measurement error of component Akm/sstat.errorfloatRVBBarycentric radial velocity of component Bkm/sphys.veloc;pos.barycenterfloate_RVBInternal measurement error of component Bkm/sstat.errorfloat