J/other/ApSS/361ivo://CDS.VizieR/J/other/ApSS/361.126CDSAk T.Bostanci Z.F.Yontan T.Bilir S.Guver T.Ak S.Urgup H.,Paunzen E.2016-11-24T12:33:31Z2016-11-24T13:32:54ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometryinfrared-photometryvisible-astronomyWide-band photometryproper-motionsWe present the results of CCD UBV observations of the open cluster NGC 6819. We calculated the stellar density profile in the cluster's field to determine the structural parameters of NGC 6819. Using the existing astrometric data, we calculated the probabilities of the stars being physical members of the cluster, and used these objects in the determination of the astrophysical parameters of NGC 6819. We inferred the reddening and metallicity of the cluster as E(B-V)=0.130+/-0.035mag and [Fe/H]=+0.051+/-0.020dex, respectively, using the U-B vs B-V two-colour diagram and UV excesses of the F-G type main-sequence stars. We fit the colour-magnitude diagrams of NGC 6819 with the PARSEC isochrones and derived the distance modula, distance and age of the cluster as mu_V=12.22+/-0.10mag, d=2309+/-106pc and t=2.4+/-0.2Gyr, respectively. The parameters of the galactic orbit estimated for NGC 6819 indicate that the cluster is orbiting in a slightly eccentric orbit of e=0.06 with a period of P_orb_=142Myr. The slope of the mass function estimated for the cluster is close to the one found for the stars in the solar neighbourhood.2016Ap&SS.361..126Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/ApSS/361.126CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/121/327 : Red Clump Stars in NGC6819 (Bragaglia+, 2001)J/MNRAS/358/795 : Variable stars in NGC 6819 field (Street+, 2005)J/AJ/138/159 : NGC6819 stellar radial-velocity & photometry (Hole+ 2009)J/ApJ/729/L10 : KIC stars properties in NGC 6791 & NGC 6819 (Basu+, 2011)J/AJ/146/43 : WIYN OCS. LV. NGC 6819 (Platais+, 2013)J/AJ/148/38 : WIYN OCS. LX. RV survey of NGC 6819 (Milliman+, 2014)J/AJ/148/51 : WIYN OCS. LXI. NGC 6819 photometry (Anthony-Twarog+ 2014)J/AJ/149/121 : WOCS. LXV. Abundances in NGC 6819 (Lee-Brown+, 2015)J/other/RAA/15.2193 : NGC 6819 3D members (Gao+, 2015)J/MNRAS/453/1095 : NGC 6866 UBVRI photometry (Bostanci+, 2015)J/other/ApSS/355.267 : NGC 6811 CCD UBVRI photometry (Yontan+, 2015)J/other/AdSpR/58.1900 : NGC 225 CCD UBV photometry (Bilir+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/ApSS/361.126https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/ApSS/361.126http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/ApSS/361.126https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/ApSS/361.126https://vizier.iucaa.in/viz-bin/votable?-source=J/other/ApSS/361.126http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/ApSS/361.126GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/ApSS/361.126/table4 (Photometric and astrometric catalogue NGC 6819)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/ApSS/361.126/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/other/ApSS/361.126/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/ApSS/361.126/table4?GETtext/xml+votable180.050000true295.102458340.05516110.0055555555555555565/36883.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/ApSS/361.126?format=asciiInfraredOpticaldefaultJ/other/ApSS/361.126/table4Photometric and astrometric catalogue NGC 6819recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/7060] Sequential numbermeta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatnullableU-B? Johnson U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B? rms uncertainty on U-Bmagstat.error;phot.color;em.opt.UfloatnullableB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.BfloatnullablepmRA? Proper motion component (pmRA*cosDE)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? rms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion componentmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? rms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullablePmemb? Membership probability%statintnullable