J/ApJ/700/523ivo://CDS.VizieR/J/ApJ/700/523doi:10.26093/cds/vizier.17000523CDSAn D.Pinsonneault M.H.Masseron T.Delahaye F.Johnson J.A.,Terndrup D.M.Beers T.C.Ivans I.I.Ivezic Z.2011-09-23T17:09:06Z2011-09-06T15:01:22ZCDS support team

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

cds-question@unistra.frglobular-star-clustersstellar-associationsvisible-astronomysloan-photometryeffective-temperatureastronomical-modelschemical-abundancesWe perform an extensive test of theoretical stellar models for main-sequence (MS) stars in ugriz, using cluster fiducial sequences obtained in the previous paper of this series. We generate a set of isochrones using the Yale Rotating Evolutionary Code with updated input physics, and derive magnitudes and colors in ugriz from MARCS model atmospheres. These models match cluster MSs over a wide range of metallicity within the errors of the adopted cluster parameters. However, we find a large discrepancy of model colors at the lower MS (T_eff_<~4500K) for clusters at and above solar metallicity. We also reach similar conclusions using the theoretical isochrones of Girardi et al. and Dotter et al., but our new models are generally in better agreement with the data. Using our theoretical isochrones, we also derive MS-fitting distances and turnoff ages for five key globular clusters, and demonstrate the ability to derive these quantities from photometric data in the Sloan Digital Sky Survey. In particular, we exploit multiple color indices (g-r, g-i, and g-z) in the parameter estimation, which allows us to evaluate internal systematic errors. Our distance estimates, with an error of {sigma}_(m-M)_=0.03-0.11mag for individual clusters, are consistent with Hipparcos-based subdwarf-fitting distances derived in the Johnson-Cousins or Stromgren photometric systems.2009ApJ...700..523Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/700/523CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/405/1711 : VRIg'i' photometry of 7 M15 giants (Mcdonald+, 2010)J/A+A/486/941 : Abundances in M71 (NGC 6838) (Alves-Brito+, 2008)J/AJ/133/1585 : Stromgren photometry in NGC 6791 (Anthony-Twarog+, 2007)J/A+A/320/757 : M3 stars CCD photometry (Ferraro+ 1997)J/AJ/107/1745 : HST UVI photometry of M15. II. (Yanny+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/700/523https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/700/523http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/700/523https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/700/523https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/700/523http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/700/523GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/700/523/table5Bolometric corrections and synthetic colors in ugrizrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[Fe/H]Metallicitylog(Sun)phys.abund.Zfloat[a/Fe]log({alpha}/Fe) abundance ratiolog(Sun)phys.abundfloatTeffEffective temperatureKphys.temperature.effectiveintlog(g)Log of surface gravitylog(cm.s**-2)phys.gravityfloatBCBolometric correction for r bandmagphot.mag.bcfloatu-gThe SDSS (u-g) color index (1)magphot.color;em.opt.U;em.opt.Bfloatg-rThe SDSS (g-r) color index (1)magphot.color;em.opt.B;em.opt.Rfloatg-iThe SDSS (g-i) color index (1)magphot.color;em.opt;em.optfloatg-zThe SDSS (g-z) color index (1)magphot.color;em.opt;em.optfloat