J/ApJS/227/12ivo://CDS.VizieR/J/ApJS/227/12doi:10.26093/cds/vizier.22270012CDSPowalka M.Lancon A.Puzia T.H.Peng E.W.Liu C.Munoz R.P.,Blakeslee J.P.Cote P.Ferrarese L.Roediger J.Sanchez-Janssen R.,Zhang H.Durrell P.R.Cuillandre J.-C.Duc P.-A.Guhathakurta P.,Gwyn S.D.J.Hudelot P.Mei S.Toloba E.2019-08-22T09:23:24Z2016-11-21T09:21:53ZCDS support team

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

cds-question@unistra.frgalaxy-clustersglobular-star-clusterstwo-color-diagramsinfrared-photometryvisible-astronomyWide-band photometrynarrow-band-photometryThe central region of the Virgo cluster of galaxies contains thousands of globular clusters (GCs), an order of magnitude more than the numbers found in the Local Group. Relics of early star formation epochs in the universe, these GCs also provide ideal targets to test our understanding of the Spectral Energy Distributions (SEDs) of old stellar populations. Based on photometric data from the Next Generation Virgo cluster Survey (NGVS) and its near-infrared counterpart NGVS-IR, we select a robust sample of ~2000 GCs with excellent photometry and spanning the full range of colors present in the Virgo core. The selection exploits the well defined locus of GCs in the uiK diagram and the fact that the globular clusters are marginally resolved in the images. We show that the GCs define a narrow sequence in 5-dimensional color space, with limited but real dispersion around the mean sequence. The comparison of these SEDs with the predictions of eleven widely used population synthesis models highlights differences between models, and also shows that no single model adequately matches the data in all colors. We discuss possible causes for some of these discrepancies. Forthcoming papers of this series will examine how best to estimate photometric metallicities in this context, and compare the Virgo globular cluster colors with those in other environments.2016ApJS..227...12Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/227/12CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/613/279 : ACS Virgo Cluster Survey. III. M87 (Jordan+, 2004)J/ApJ/802/30 : NGVS VI. Ultra-compact dwarfs in M87 (Zhang+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/227/12https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/227/12http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/227/12https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/227/12https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/227/12http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/227/12GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/227/12/catalog (Photometry for 1846 Virgo core globular clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/227/12/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/227/12/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/227/12/catalog?GETtext/xml+votable180.050000true187.8409930611.554066110.0055555555555555565/6941 6/27743 27773 27914 27936 27938 27939 27944https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/227/12?format=asciiInfraredOpticaldefaultJ/ApJS/227/12/catalogPhotometry for 1846 Virgo core globular clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainE(B-V)Extinction (1)magphot.color.excessfloatu*magap8MegaCam/WirCam u* AB magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag;em.opt.Ufloatgmagap8MegaCam/WirCam g AB magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag;em.opt.Bfloatrmagap8MegaCam/WirCam r AB magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag;em.opt.Rfloatimagap8MegaCam/WirCam i AB magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag;em.opt.Ifloatzmagap8MegaCam/WirCam z AB magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag;em.opt.IfloatKsmagap8MegaCam/WirCam Ks AB magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag;em.IR.Kfloatu*0magap8Dereddened u* magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag.reddFree;em.opt.Ufloatg0magap8Dereddened g magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag.reddFreefloatr0magap8Dereddened r magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag.reddFree;em.opt.Rfloati0magap8Dereddened i magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag.reddFree;em.opt.Ifloatz0magap8Dereddened z magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag.reddFree;em.opt.IfloatKs0magap8Dereddened Ks magnitude; aperture corrected magnitude based on 8pix aperturemagphot.mag.reddFreefloate_u*magap81-sigma error on u*magap8 (2)magstat.error;pos.cartesian.xfloate_gmagap81-sigma error on gmagap8 (2)magstat.errorfloate_rmagap81-sigma error on rmagap8 (2)magstat.errorfloate_imagap81-sigma error on imagap8 (2)magstat.errorfloate_zmagap81-sigma error on zmagap8 (2)magstat.errorfloate_Ksmagap81-sigma error on Ksmagap8 (2)magstat.errorfloat(u*-g)calu*-g color, dereddenedmagphot.color.reddFree;em.opt.U;em.opt.Bfloat(g-r)calg-r color, dereddenedmagphot.color.reddFree;em.opt.Rfloat(r-i)calr-i color, dereddenedmagphot.color.reddFree;em.opt.R;em.opt.Ifloat(i-z)cali-z color, dereddenedmagphot.color.reddFree;em.opt.I;em.opt.Ifloat(i-Ks)cali-Ks color, dereddenedmagphot.color.reddFree;em.opt.Ifloat(g-r)cal.slrDereddened g-r color index ; after re-calibration with SLRmagphot.color;em.opt.B;em.opt.Rfloat(r-i)cal.slrDereddened r-i color index ; after re-calibration with SLRmagphot.color;em.opt.R;em.opt.Ifloat(i-z)cal.slrDereddened i-z color index ; after re-calibration with SLRmagphot.color;em.opt.I;em.opt.Ifloat(i-Ks)cal.slrDereddened i-Ks color index ; after re-calibration with SLRmagphot.color;em.opt.I;em.IR.KfloatSimbadSimbad column added by the CDSmeta.ref.urlchar