J/A+A/369/812ivo://CDS.VizieR/J/A+A/369/812doi:10.26093/cds/vizier.33690812CDSRejkuba M.2001-09-15T09:36:18Z2001-09-15T09:06:54ZCDS support team

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

cds-question@unistra.frglobular-star-clustersphotometryAt the distance of NGC 5128 (3.6+/-0.2Mpc) it is possible to resolve globular clusters with high resolution imaging from the ground, thus allowing the globular cluster candidate selection primarily through their morphological properties. I report the discovery of 71 globular clusters in NGC 5128 on VLT UT1+FORS1 images, including the faintest members (M_V_~-5) known to date in this galaxy as well as in 5 previously-known clusters. U- and V-band photometry has been measured for all the candidates and the luminosity function, spanning -10.1<M_V_<-4.9 and -9.3<M_U_<-3.3, constructed. These are the deepest globular cluster luminosity functions in an elliptical galaxy determined so far. The Kolmogorov-Smirnov statistics show that the difference between the globular cluster luminosity functions of NGC 5128 and the Milky Way is not larger than the difference between the ones of M 31 and the Milky Way. The (U-V)_0_ color histogram shows a bimodal distribution. For 23 globular clusters I obtained K-band images with SOFI at the NTT in La Silla. Their positions in the (U-V) vs. (V-K) color-color diagram indicate that they are indeed old globular clusters. Assuming that the globular clusters in NGC 5128 span a similar age range as the ones in the Milky Way and adopting a linear fit between the metallicity and (U-V)0 color, the metal-rich clusters peak at [Fe/H]=-0.6dex and the metal-poor ones peak at [Fe/H]=-1.7dex.2001A&A...369..812Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/369/812CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/369/812https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/369/812http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/369/812https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/369/812https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/369/812http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/369/812GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/369/812/table3 (Coordinates, photometry, FWHM (fV and fU), ellipticities (ellV and ellU) and projected galactocentric distance of globular cluster candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/369/812/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/369/812/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/369/812/table3?GETtext/xml+votable180.050000true201.6096667-42.81550.005555555555555556Cone search capability for table J/A+A/369/812/table4 (Same as table3, but for other extended objects, some of which might well be globular clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/369/812/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/369/812/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/369/812/table4?GETtext/xml+votable180.050000true201.6177917-42.83441670.0055555555555555566/43262-43263https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/369/812?format=asciiOpticaldefaultJ/A+A/369/812/table3Coordinates, photometry, FWHM (fV and fU), ellipticities (ellV and ellU) and projected galactocentric distance of globular cluster candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[R2001b]Object namemeta.id;meta.maincharRA2000Right ascension (2000)pos.eq.ra;meta.mainDE2000Declination (2000)pos.eq.dec;meta.mainVmagBessel V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.errorfloatUmagBessel U magnitudemagphot.mag;em.opt.Ufloatu_UmagUncertainty flag on Umagmeta.code.errorchare_Umagrms uncertainty on Umagmagstat.errorfloatu_e_UmagUncertainty flag on e_Umagmeta.code.errorcharKsmag? Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.errorfloatnullableFWMHV? V-band FWHM (1 pix = 0.2")pixphys.angSize;srcfloatnullableFWMHU? U-band FWHM (1 pix = 0.2")pixphys.angSize;srcfloatnullableu_FWMHUUncertainty flag on FWMHUmeta.code.errorcharellV? Ellipticity in Vsrc.ellipticityfloatnullableellU? Ellipticity in Usrc.ellipticityfloatnullableu_ellUUncertainty flag on eUmeta.code.errorcharRProjected galactocentric distancekpcpos.distancefloatNoteNote (1)meta.notecharJ/A+A/369/812/table4Same as table3, but for other extended objects, some of which might well be globular clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[R2001b]Object namemeta.id;meta.maincharRA2000Right ascension (2000)pos.eq.ra;meta.mainDE2000Declination (2000)pos.eq.dec;meta.mainVmagBessel V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.errorfloatUmagBessel U magnitudemagphot.mag;em.opt.Ufloatu_UmagUncertainty flag on Umagmeta.code.errorchare_Umagrms uncertainty on Umagmagstat.errorfloatu_e_UmagUncertainty flag on e_Umagmeta.code.errorcharKsmag? Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.errorfloatnullableFWMHV? V-band FWHM (1 pix = 0.2")pixphys.angSize;srcfloatnullableFWMHU? U-band FWHM (1 pix = 0.2")pixphys.angSize;srcfloatnullableu_FWMHUUncertainty flag on FWMHUmeta.code.errorcharellV? Ellipticity in Vsrc.ellipticityfloatnullableellU? Ellipticity in Usrc.ellipticityfloatnullableu_ellUUncertainty flag on eUmeta.code.errorcharRProjected galactocentric distancekpcpos.distancefloatNoteNote (1)meta.notechar