J/A+A/470/585ivo://CDS.VizieR/J/A+A/470/585doi:10.26093/cds/vizier.34700585CDSBalaguer-Nunez L.Galadi-Enriquez D.Jordi C.,2017-06-13T11:09:06Z2007-09-02T15:10:00ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometryvisible-astronomymedium-band-photometryFollowing deep astrometric and photometric study of the cluster NGC 2682 (M 67), we are able to accurately determine its fundamental parameters. Being an old and rich cluster, M 67 is relevant for the analysis of the Galactic disk evolution. M 67 is well studied but lacks a wide and deep Stroemgren photometric study. The brightest stars of the open cluster M 67 were used as uvby-Hbeta standard stars in our studies of NGC 1817 and NGC 2548, and the extension of the field covered, as well as the number of observations, allowed us to obtain the best set of Stroemgren data ever published for this cluster. We discuss the results of our CCD uvby-Hbeta intermediate-band photometry, covering an area of about 50'x50' down to V~19. Moreover, a complete membership segregation based on astrometric and photometric criteria is obtained. The photometric analysis of a selected sample of stars yields a reddening value of E(b-y)=0.03+/-0.03, a distance modulus of V_0_-M_V_=9.7+/-0.2 and [Fe/H]=0.01+/-0.14. Through isochrone fitting we found an age of logt=9.6+/-0.1 (4.2+/-0.2Gyr). A clump of approximately 60 stars around V=16, (b-y)=0.4 could be interpreted as a population of pre-cataclysmic variable stars (if members), or as a stream of field G-type stars placed at twice the distance of the cluster (if non-members).2007A&A...470..585Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/470/585CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/252 : The USNO-A2.0 Catalogue (Monet+ 1998)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)I/259 : The Tycho-2 Catalogue (Hog+ 2000)J/A+AS/100/243 : Proper motions in M 67 (Zhao+, 1993)http://www.univie.ac.at/webda : WEBDA Databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/470/585https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/470/585http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/470/585https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/470/585https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/470/585http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/470/585GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/470/585/table34 (Stromgren photometry and Cross-identification of stars in NGC 2682 area)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/470/585/table34?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/470/585/table34?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/470/585/table34?GETtext/xml+votable180.050000true132.36087511.699655560.0055555555555555566/4253 4255 4296 4298https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/470/585?format=asciiOpticaldefaultJ/A+A/470/585/table34Stromgren photometry and Cross-identification of stars in NGC 2682 areaSanSanders (1977A&AS...27...89S) identification numbermeta.idcharHIP? Hipparcos (<I/239>) identification numbermeta.idintnullableTYC1? TYC1 (<I/239>) identification numbermeta.idintnullableTYC2? TYC2 (<I/259>) identification numbermeta.idintnullableUSNO2USNO2 (<I/252>) identification numbermeta.idcharBDA? BDA identification numbermeta.idintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainxposx-frame coordinate in arcminarcminpos.framedoubleyposy-frame coordinate in arcminarcminpos.cartesian.y;instr.detdoubleb-y? b-y color indexmagphot.color;em.opt.B;em.opt.Vdoublenullablee_b-y? error in b-ymagstat.error;phot.color;em.opt.BfloatnullableVmag? V magnitudemagphot.mag;em.opt.Vdoublenullablee_Vmag? error in Vmagmagstat.error;phot.mag;em.opt.Vfloatnullablem1? Stroemgren m1 color indexmagphot.colordoublenullablee_m1? error in m1magstat.errorfloatnullablec1? Stroemgren c1 color indexmagphot.colordoublenullablee_c1? error in c1magstat.errorfloatnullableHb? Stroemgren Hbeta color indexmagspect.index;em.line.Hbetadoublenullablee_Hb? error in Hbetamagstat.errorfloatnullableMem[M NM] Membership labelmeta.code.membercharZhao? Zhao et al. 1993, Cat. <J/A+AS/100/243>, number, CL* NGC 2682 ZTP NNNN in Simbadmeta.idintnullableJ/A+A/470/585/table7Parametric and Non-Parametric Astrometric ProbabilityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_ZhaoSimbad column added by the CDSmeta.ref.urlcharZhaoZhao et al (1993, Cat. <J/A+AS/100/243>) number, CL* NGC 2682 ZTP NNNN in Simbadmeta.id;meta.mainintprimarySanSanders (1977A&AS...27...89S) identification number, Cl* NGC 2682 Sand NNNNa in Simbadmeta.idcharBmagPhotographic B magnitude (1)magphot.mag;em.opt.BfloatVmag? Photographic V magnitude (1)magphot.mag;em.opt.VfloatnullablepmXProper motion in xmas/yrpos.pm;pos.cartesian.xfloate_pmXerror in PMxmas/yrstat.errorfloatpmYProper motion in ymas/yrpos.pm;pos.cartesian.yfloate_pmYerror in PMymas/yrstat.errorfloatMembPParametric membership probabilitymeta.code.memberfloatMembNPNon-parametric membership probabilitymeta.code.memberfloatNplatesNumber of platesmeta.id;instr.plateint