J/AJ/138/159ivo://CDS.VizieR/J/AJ/138/159doi:10.26093/cds/vizier.51380159CDSHole K.T.Geller A.M.Mathieu R.D.Platais I.Meibom S.Latham D.W.2018-01-31T06:09:53Z2011-12-28T16:42:26ZCDS support team

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

cds-question@unistra.fropen-star-clustersradial-velocityccd-photometryinfrared-photometryvisible-astronomybroad-band-photometryWe present the current results from our ongoing radial-velocity (RV) survey of the intermediate-age (2.4Gyr) open cluster NGC 6819. Using both newly observed and other available photometry and astrometry, we define a primary target sample of 1454 stars that includes main-sequence, subgiant, giant, and blue straggler stars, spanning a magnitude range of 11<=V<=16.5 and an approximate mass range of 1.1-1.6M_{sun}_. Our sample covers a 23 arcminute (13pc) square field of view centered on the cluster. We have measured 6571 radial velocities for an unbiased sample of 1207 stars in the direction of the open cluster NGC 6819, with a single-measurement precision of 0.4km/s for most narrow-lined stars. We use our RV data to calculate membership probabilities for stars with >=3 measurements, providing the first comprehensive membership study of the cluster core that includes stars from the giant branch through the upper main sequence. We identify 480 cluster members. Additionally, we identify velocity-variable systems, all of which are likely hard binaries that dynamically power the cluster.2009AJ....138..159Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/159CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/358/795 : Variable stars in NGC 6819 field (Street+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/138/159https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/138/159http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/138/159https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/138/159https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/138/159http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/138/159GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/138/159/table1 (The NGC 6819 WOCS photometry database)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/138/159/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/138/159/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/138/159/table1?GETtext/xml+votable180.050000true295.327958340.195250.005555555555555556Cone search capability for table J/AJ/138/159/table2 (The NGC 6819 WOCS radial-velocity database)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/138/159/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/138/159/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/138/159/table2?GETtext/xml+votable180.050000true295.327958340.195250.0055555555555555565/36881.5062136169708525e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/138/159?format=asciiOpticalInfrareddefaultJ/AJ/138/159/table1The NGC 6819 WOCS photometry databaserecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWOCS[1001/115030] WIYN Open Cluster Study identification (G1)meta.id;meta.mainintVmag? Phot98 project V band magnitudemagphot.mag;em.opt.VfloatnullableB-V? Phot98 project (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatnullableV-R? Phot98 project (V-R) color indexmagphot.color;em.opt.V;em.opt.RfloatnullableV-I? Phot98 project (V-I) color indexmagphot.color;em.opt.V;em.opt.IfloatnullableVmag1? Phot03 project V band magnitudemagphot.mag;em.opt.VfloatnullableB-V1? Phot03 project (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatnullableVmag2? Rosvick & Vandenberg (1998AJ....115.1516R) V band magnitudemagphot.mag;em.opt.VfloatnullableB-V2? Rosvick & Vandenberg (1998AJ....115.1516R) (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatnullableJmag? 2MASS J band magnitudemagphot.mag;em.IR.JfloatnullableS72? Sanders (1972A&A....19..155S) identification, <[S72b] NGC 6819 NNN> in Simbadmeta.idintnullable_RAPosition for stars having a radial velocity (right ascension part)degpos.eq.ra;meta.mainnullable_DEPosition for stars having a radial velocity (declination part)degpos.eq.dec;meta.mainnullableVmag3? Kalirai et al. (2001AJ....122..266K) V band magnitudemagphot.mag;em.opt.VfloatnullableB-V3? Kalirai et al. (2001AJ....122..266K) (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatnullableJ-Ks? 2MASS (J-Ks) color indexmagphot.color;em.IR.J;em.IR.KfloatnullableA74? Auner (1974A&AS...13..143A) identification, <NGC 6819 NNN> in Simbadmeta.idintnullableJ/AJ/138/159/table2The NGC 6819 WOCS radial-velocity databaserecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWOCSWIYN Open Cluster Study identification (G1)meta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmagAveraged V band magnitudemagphot.mag;em.opt.VfloatB-VAveraged B-V color indexmagphot.color;em.opt.B;em.opt.VfloatN1Number of WIYN RV measurementsmeta.numberintN2Number of CfA RV measurementsmeta.numberintRVMean radial velocitykm/sspect.dopplerVeloc;stat.meanfloate_RVStandard error of RV (1)km/sstat.errorfloate/i? external/internal error ratio (2)stat.errorfloatnullableMmb? Calculated RV membership probability%meta.code.memberintnullablebinBinarity classification (3)meta.code.multipchargamma? Center-of-mass radial velocity {gamma}km/sphys.veloc;pos.barycenterfloatnullableComAdditional commentmeta.notechar