J/AJ/145/134ivo://CDS.VizieR/J/AJ/145/134doi:10.26093/cds/vizier.51450134CDSCurtis J.L.Wolfgang A.Wright J.T.Brewer J.M.Johnson J.A.2017-12-06T07:39:03Z2014-05-26T12:44:26ZCDS support team

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

cds-question@unistra.fropen-star-clustersvariable-starsgiant-starsproper-motionsradial-velocityinfrared-photometryvisible-astronomybroad-band-photometryRuprecht 147 is a hitherto unappreciated open cluster that holds great promise as a standard in fundamental stellar astrophysics. We have conducted a radial velocity survey of astrometric candidates with Lick, Palomar, and MMT observatories and have identified over 100 members, including 5 blue stragglers, 11 red giants, and 5 double-lined spectroscopic binaries (SB2s). We estimate the cluster metallicity from spectroscopic analysis, using Spectroscopy Made Easy (SME), and find it to be [M/H]=+0.07+/-0.03. We have obtained deep CFHT/MegaCam g'r'i'z' photometry and fit Padova isochrones to the (g'-i') and Two Micron All Sky Survey (J-K_S_) color-magnitude diagrams, using the {tau}^2^ maximum-likelihood procedure of Naylor, and an alternative method using two-dimensional cross-correlations developed in this work. We find best fits for Padova isochrones at age t=2.5+/-0.25Gyr, m-M=7.35+/-0.1, and A_V_=0.25+/-0.05, with additional uncertainty from the unresolved binary population and possibility of differential extinction across this large cluster. The inferred age is heavily dependent on our choice of stellar evolution model: fitting Dartmouth and PARSEC models yield age parameters of 3Gyr and 3.25Gyr, respectively. At ~300pc and ~3Gyr, Ruprecht 147 is by far the oldest nearby star cluster.2013AJ....145..134Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/145/134CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/ocl : Optically visible open clusters and Candidates (Dias+ 2002-2013)I/322 : UCAC4 Catalogue (Zacharias+, 2012)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/317 : The PPMXL Catalog (Roeser+ 2010)I/297 : NOMAD Catalog (Zacharias+ 2005)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/A+A/564/A79 : Optically visible open clusters proper motions (Dias+, 2014)J/PAZh/38/571 : Astrophysical parameters of 593 open clusters (Gozha+, 2012)J/A+A/548/A97 : Catalogue of variable stars in open clusters (Zejda+, 2012)J/MNRAS/407/2109 : Kinematic study of open clusters (Vande Putte+, 2010)J/A+A/446/949 : Open clusters proper motions based on UCAC2 (Dias+, 2006)J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)J/ApJS/141/503 : Radial Velocities for 889 late-type stars (Nidever+, 2002)J/A+A/376/441 : Absolute proper motions of 112 open clusters (Dias+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/145/134https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/145/134http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/145/134https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/145/134https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/145/134http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/145/134GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/145/134/table3 (Radial velocities, proper motions and membership in Ruprecht 147)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/145/134/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/145/134/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/145/134/table3?GETtext/xml+votable180.050000true288.8588333-16.09919440.0055555555555555566/29023 29044 29045 29047 29706 29728 29729 297301.5062136169708525e-19 4.752121017816135e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/145/134?format=asciiOpticalInfrareddefaultJ/AJ/145/134/table3Radial velocities, proper motions and membership in Ruprecht 147_RAPositions from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS name (declination part)degpos.eq.dec;meta.mainStar[1/108] Running star number (1)meta.id;meta.mainintprimary2MASS2MASS identifier (HHMMSSss+DDMMSSs)meta.idcharpmRAProper motion in Right Ascension (2)mas/yrpos.pm;pos.eq.rafloate_pmRA1-{sigma} uncertainty in pmRA (2)mas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in Declination (2)mas/yrpos.pm;pos.eq.decfloate_pmDE1-{sigma} uncertainty in pmDE (2)mas/yrstat.error;pos.pm;pos.eq.decfloatg'mag? CFHT/MegaCam g' magnitudemagphot.mag;em.opt.Bfloatnullableg'-i'? CFHT/MegaCam (g'-i') color indexmagphot.colorfloatnullableJmag2MASS J magnitude (from cat. II/246) (3)magphot.mag;em.IR.Jfloatf_Jmag[e] Probable binary (star #51) (4)meta.codecharJ-K2MASS (J-Ks) color index (from cat. II/246) (3)magphot.color;em.IR.J;em.IR.KfloatRV1? Lick/Palomar radial velocitykm/sspect.dopplerVelocfloatnullableRV2? Hectochelle radial velocitykm/sspect.dopplerVelocfloatnullableMm[NPY] Overall membership probability (5)meta.code.membercharMpm[NPY] Membership probability assigned to proper motion radial distance from cluster value (5)meta.code.membercharMv1[NPY] Membership probability assigned to Lick/Palomar radial velocities (5)meta.code.membercharMv2[NPY] Membership probability assigned to Hectochelle radial velocities (5)meta.code.membercharMjk[NPYB] Membership probability assigned to 2MASS (J-Ks) color-magnitude diagram (5)meta.code.membercharMgi[NPYB] Membership probability assigned to CFHT/MegaCam (g'-i') color-magnitude diagram (5)meta.code.membercharu_Type[?] Uncertainty flag on Type (?)meta.notecharTypeStar classification (6)meta.code.classcharMDisplay what exists in VizieR at this position (within 1.5)meta.code.membercharSimbadSimbad column added by the CDSmeta.ref.urlchar