J/A+A/599/A70ivo://CDS.VizieR/J/A+A/599/A70doi:10.26093/cds/vizier.35990070CDSJanson M.Durkan S.Hippler S.Dai X.Brandner W.Schlieder J.,Bonnefoy M.Henning T.2017-10-18T08:24:34Z2017-03-02T07:24:51ZCDS support team

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

cds-question@unistra.frmultiple-starslate-type-starspre-main-sequence-starsThe solar galactic neighbourhood contains a number of young co-moving associations of stars (so-called 'young moving groups') with ages of ~10-150 Myr, which are prime targets for a range of scientific studies, including direct imaging planet searches. The late-type stellar population of such groups still remain in their pre-main sequence phase, and are thus well suited for purposes such as isochronal dating. Close binaries are particularly useful in this regard, since they allow for a model-independent dynamical mass determination. Here we present a dedicated effort to identify new close binaries in nearby young moving groups, through high-resolution imaging with the AstraLux Sur Lucky Imaging camera. We surveyed 181 targets, resulting in the detection of 61 companions or candidates, of which 38 are new discoveries.2017A&A...599A..70Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/599/A70CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/599/A70https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/599/A70http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/599/A70https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/599/A70https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/599/A70http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/599/A70GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap1.5062136169708525e-19 1.7003137259100215e-19defaultJ/A+A/599/A70/table1Full sample summaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintpropindicates astrometric and/or photometric propertiesmeta.ref.urlchar2MASS2MASS identifier (JHHMMSSss+DDMMSSs)meta.id;meta.maincharprimarySpTypeSpectral typesrc.spTypecharYMGYoung Moving Group assignmentmeta.codecharr_YMGReference for the YMG assignment (1)meta.ref;pos.framecharJmagApparent J-band magnitude from 2MASSmagphot.mag;em.IR.JfloatpmRAProper motion along right ascensionmas/yrpos.pm;pos.eq.rafloatpmDEProper motion along declinationmas/yrpos.pm;pos.eq.decfloatDistDistance to the targetpcpos.distance;pos.heliocentricfloatMethodMethod for determining the distance (2)meta.notecharMultMultiplicity count (3)meta.code.multip;phot.countintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/599/A70/table2Astrometric properties2MASS2MASS identifiermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPairPair identifier (1)meta.code.multipcharSepSeparation at the given epocharcsecpos.angDistance;src.orbitalfloate_SepSeparation errorarcsecstat.errorfloatPAPosition angle at the given epochdegpos.posAngfloate_PAPosition angle errordegstat.errorfloatEpochEpoch of observationyrtime.epochfloatCPMCommon Proper Motion flag (2)meta.codecharr_CPMReference for CPM determination (3)meta.ref;pos.framecharJ/A+A/599/A70/table3Photometric propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identifiermeta.id;meta.maincharPairPair identifiermeta.code.multipchardzmagz'-band magnitude differencemagphot.mag;arith.difffloate_dzmagz'-band magnitude errormagstat.error;phot.magfloatM1Estimated mass of the primarysolMassphys.massfloatM2Estimated mass of the secondarysolMassphys.massfloataEstimated semi-major axisAUphys.size.smajAxisintPorbEstimated orbital periodyrtime.periodint