J/A+A/399/315ivo://CDS.VizieR/J/A+A/399/315doi:10.26093/cds/vizier.33990315CDSStrassmeier K.G.Rice J.B2017-06-28T06:58:18Z2003-03-30T16:17:35ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsradial-velocityWe present the first Doppler image for both stellar components of the F9+G0 ZAMS binary {sigma}^2^ CrB and found evidence for the coexistence of cool and warm spots on both stars. Cool spots appear mainly at polar or high latitudes while a confined equatorial warm belt appears on the trailing hemisphere of each of the two stars with respect to the orbital motion. We also present an update of the TempMap imaging code that allows us to solve the stellar surface temperature distribution on both binary components simultaneously, including photometric input. Several test reconstructions are performed to demonstrate its reliability and robustness. Our new orbital solution results in very precise masses for both components - good to 0.4% - and confirms the spectral classifications of F9 and G0 for the primary and secondary, respectively. The visual component, {sigma}^1^, seems to be G4 rather than G0. All three components are on or very close to the ZAMS which is also confirmed by the relatively high lithium abundance of about twenty times the solar abundance.2003A&A...399..315Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/399/315CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/399/315https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/399/315http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/399/315https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/399/315https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/399/315http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/399/315GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/399/315/table1a{sigma}^2^ CrB Star 1 radial velocities, CFHT-Gecko May2000recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublePhaseOrbital phase according to "Table3" sectiontime.phasefloatRVRadial velocity in km/skm/sphys.veloc;pos.heliocentricfloatO-C? O-C from the orbital computationkm/sstat.fit.residualfloatnullableObsObservatory name (CFHT: Canada-France-Hawaii Telescope)meta.id;instr.obstycharJ/A+A/399/315/table1b{sigma}^2^ CrB Star 2 radial velocities, CFHT-Gecko May2000recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublePhaseOrbital phase according to "Table3" sectiontime.phasefloatRVRadial velocity in km/skm/sphys.veloc;pos.heliocentricfloatO-C? O-C from the orbital computationkm/sstat.fit.residualfloatnullableObsObservatory name (CFHT: Canada-France-Hawaii Telescope)meta.id;instr.obstychar