J/MNRAS/426/1475ivo://CDS.VizieR/J/MNRAS/426/1475doi:10.26093/cds/vizier.74261475CDSUsher C.Forbes D.A.Brodie J.P.Foster C.Spitler L.R.Arnold J.A.,Romanowsky A.J.Strader J.Pota V.2024-07-18T20:19:22Z2013-08-02T11:31:38ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustersvisible-astronomysloan-photometryspectroscopyAlthough the colour distribution of globular clusters in massive galaxies is well known to be bimodal, the spectroscopic metallicity distribution has been measured in only a few galaxies. After redefining the calcium triplet index-metallicity relation, we use our relation to derive the metallicity of 903 globular clusters in 11 early-type galaxies. This is the largest sample of spectroscopic globular cluster metallicities yet assembled. We compare these metallicities with those derived from Lick indices finding good agreement. In six of the eight galaxies with sufficient numbers of high-quality spectra we find bimodality in the spectroscopic metallicity distribution. Our results imply that most massive early-type galaxies have bimodal metallicity as well as colour distributions. This bimodality suggests that most massive early-type galaxies experienced two periods of star formation.2012MNRAS.426.1475Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/426/1475CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/MNRAS/385/361 : NGC 821 globular clusters BVRcIc photometry (Spitler+, 2008)J/AJ/137/4956 : Globular clusters around NGC 1407 (Romanowsky+, 2009)J/MNRAS/415/3393 : Stars and globulars in NGC4494 (Foster+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/426/1475https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/426/1475http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/426/1475https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/426/1475https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/426/1475http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/426/1475GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/426/1475/table3 (Calcium triplet measurements and metallicities (corrected version of 23-03-2016))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/426/1475/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/426/1475/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/426/1475/table3?GETtext/xml+votable180.050000true32.0736410.961666940.0055555555555555566/520 7384-7385 8196 13401 18269 26803 26809 27604 27718 28142 28494-28495 28516-28517 36247 36290https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/426/1475?format=asciiOpticaldefaultJ/MNRAS/426/1475/table1Galaxy propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id;meta.maincharTypeHubble type of galaxymeta.note;src.morph.typecharVsysSystemic velocity from Cappellari et al. (2011, Cat. J/MNRAS/413/813)km/sphys.velocint(M-m)Distance modulus (1)magphot.mag.distModfloatDistDistance (1)Mpcpos.distance;pos.heliocentricfloatKMAGAbsolute 2MASS K-band magnitude (2)magphot.mag;em.IR.KfloatABB-band foreground Galactic extinction from Schlegel et al. (1998ApJ...500..525S)magphys.absorptionfloatNgc[7/202] number of GCs with CaT measurementsmeta.numberintg-i? g-i colour split between subpopulations from literature (3)magphot.colorfloatnullabler_g-iReference for g-i (4)meta.ref;pos.framecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/426/1475/table3Calcium triplet measurements and metallicities (corrected version of 23-03-2016)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameGlobular cluster name, NGCNNNN_GCNNN (1)meta.id;meta.maincharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.maing-ig-i colour indexmagphot.colorfloate_g-irms uncertainty on g-imagstat.errorfloatimagi magnitudemagphot.mag;em.opt.Ifloate_imagrms uncertainty on imagmagstat.error;phot.mag;em.opt.IfloatCaTCaT index measurement corrected from S/N bias0.1nmspect.indexfloate_CaTError on CaT (lower value)0.1nmstat.errorfloatE_CaTError on CaT (upper value)0.1nmstat.error;stat.maxfloat[Z/H]Total metallicitylog(Sun)phys.abund.Zfloate_[Z/H]Error on [Z/H] (lower value)log(Sun)stat.error;src.redshiftfloatE_[Z/H]Error on [Z/H] (upper value)log(Sun)stat.error;stat.maxfloatP1Display data from Pota et al. (2013, J/MNRAS/428/389) or Foster et al. (2011, J/MNRAS/415/3393)meta.ref.urlchar