J/AJ/118/2894ivo://CDS.VizieR/J/AJ/118/2894doi:10.26093/cds/vizier.51182894CDSSarajedini A.Von Hippel T.Kozhurina-Platais V.Demarque P.2023-04-06T16:50:35Z2012-10-12T13:07:54ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryccd-photometryWe present high-precision UBVRI CCD photometry of the old open cluster NGC 188. Our color-magnitude diagram extends from near the red giant branch tip to as faint as ~5mag below the main-sequence turnoff. From an analysis of these data along with published photometry for M67, we draw the following conclusions: (1) From the UBV two-color diagram, we find a reddening of E(B-V)=0.04+/-0.02 for M67 and E(B-V)=0.09+/-0.02 for NGC 188. (2) Based on main-sequence fitting to solar abundance isochrones, the distance moduli turn out to be (m-M)v=9.69+/-0.11 for M67 and (m-M)v=11.44+/-0.08 for NGC 188. (3) The comparison of the CMDs to theoretical isochrones indicates that an amount of core convective overshoot equivalent to 0.10 of a pressure scale height is appropriate for M67, while no overshoot is required to fit the CMD of NGC 188. These isochrones suggest that NGC 188 is 3.0+/-0.7 Gyr older than M67. (4) There is a clear indication of mass segregation in both M67 and NGC 188, with the most massive stars (M/M_{sun}_>1.1) being more centrally concentrated than those that are the least massive (0.8>=M/M_{sun}_>0.65).1999AJ....118.2894Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/118/2894CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/185 : NGC 188 photographic UBV photom. star catalog (Frolov, 1990)J/A+A/390/961 : VI photometry in NGC 188 (Andreuzzi+, 2002)J/AJ/124/601 : Absolute positions & proper motions in NGC 188 (Platais+ 2002)J/AJ/126/2922 : Astrometry and membership in NGC 188 (Platais+, 2003)J/PASP/116/1012 : A star catalog for the open cluster NGC 188 (Stetson+, 2004)J/A+A/438/291 : X-ray sources in NGC 188 (Gondoin+, 2005)J/AJ/131/1565 : UBVI photometry of Berkeley 17 and NGC 188 (Krusberg+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/118/2894https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/118/2894http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/118/2894https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/118/2894https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/118/2894http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/118/2894GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/118/2894/table (UBVRI CCD photometry of NGC 188)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/118/2894/table?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/118/2894/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/118/2894/table?GETtext/xml+votable180.050000true13.911622585.180777220.0055555555555555566/4075-4076 40782.367228618189496e-19 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/118/2894?format=asciiOpticalInfrareddefaultJ/AJ/118/2894/tableUBVRI CCD photometry of NGC 188recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintXposX positionpixpos.cartesian.x;instr.detdoubleYposY positionpixpos.cartesian.y;instr.detdoubleImag? I magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatnullableRmag? R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? rms uncertainty on Rmagmagstat.error;phot.mag;em.opt.RfloatnullableVmag? V magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatnullableBmag? B magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? rms uncertainty on Bmagmagstat.error;phot.mag;em.opt.BfloatnullableUmag? U magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? rms uncertainty on Umagmagstat.error;phot.mag;em.opt.Ufloatnullable_RAPosition computed from a comparison with 2MASS (Cat. II/246) ({sigma}=0.09'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with 2MASS (Cat. II/246) ({sigma}=0.09'') (declination part)degpos.eq.dec;meta.main