J/MNRAS/436/1172ivo://CDS.VizieR/J/MNRAS/436/1172doi:10.26093/cds/vizier.74361172CDSUsher C.Forbes D.A.Spitler L.R.Brodie J.P.Romanowsky A.J.,Strader J.Woodley K.A.2024-08-06T20:17:28Z2014-12-02T13:46:18ZCDS support team

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

cds-question@unistra.frglobular-star-clustersphotometryradial-velocityWe use multipointing Hubble Space Telescope Advanced Camera for Surveys and wide field Subaru Suprime-Cam imaging to study the globular cluster system of the L* elliptical galaxy NGC 4278. We have also obtained a handful of new globular cluster spectra with the Keck Deep Imaging Multi-Object Spectrograph. We determine the globular cluster surface density profile and use it to calculate the total number of globular clusters, finding the system to be slightly more populous than average for galaxies of its luminosity. We find clear evidence for bimodality in the globular cluster colour distribution and for a colour-magnitude relation in the blue subpopulation (a 'blue tilt'). We also find negative radial colour gradients in both colour subpopulations of equal strength which are similar in strength to those reported in other galaxies. The sizes of NGC 4278's globular clusters decrease with redder colours and increase with galactocentric radius. The ratio of the sizes of blue to red globular clusters is independent of galactocentric radius demonstrating that internal effects are responsible for the size difference with colour.2013MNRAS.436.1172Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/436/1172CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/426/1475 : CaT in 903 globular clusters (Usher+, 2012)J/MNRAS/428/389 : SLUGGS globular clusters in early-type galaxies (Pota+ 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/436/1172https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/436/1172http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/436/1172https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/436/1172https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/436/1172http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/436/1172GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/436/1172/table3 (ACS globular cluster candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/436/1172/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/436/1172/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/436/1172/table3?GETtext/xml+votable180.050000true185.01599529.277228060.005555555555555556Cone search capability for table J/MNRAS/436/1172/table5 (Suprime-Cam globular cluster candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/436/1172/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/436/1172/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/436/1172/table5?GETtext/xml+votable180.050000true185.2649080629.329283060.005555555555555556Cone search capability for table J/MNRAS/436/1172/tablea1 (Spectroscopically confirmed objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/436/1172/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/436/1172/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/436/1172/tablea1?GETtext/xml+votable180.050000true185.0793338929.258191940.0055555555555555566/28494-28495 28516-285172.1350832807657816e-19 2.2630631615001444e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/436/1172?format=asciiOpticaldefaultJ/MNRAS/436/1172/table3ACS globular cluster candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintACS[11/2507] ACS designation (NNNN)meta.id;meta.mainintprimaryRAJ2000Right Ascension in degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in degrees (J2000)degpos.eq.dec;meta.maing-zACS g-z (F475W-F850LP) colour indexmagphot.colorfloate_g-zrms uncertainty on g-zmagstat.errorfloatzmagHST/ACS F850LP (z band) magnitudemagphot.mag;em.opt.Ifloate_zmagrms uncertainty on zmagmagstat.error;phot.mag;em.opt.IfloatrhlACS half light radiuspcphysfloate_rhlrms uncertainty on rhlpcstat.errorfloatRV? Radial velocity, or redshift (G2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV? rms uncertainty on RVkm/sstat.errorintnullable[Z/H]? Metallicity based on Calcium tripletlog(Sun)phys.abund.Zfloatnullablee_[Z/H]? Error on [Z/H] (lower value)log(Sun)stat.error;src.redshiftfloatnullableE_[Z/H]? Error on [Z/H] (upper value)log(Sun)stat.error;stat.maxfloatnullableNameSpectroscopic designation (G1)meta.idcharSuName[1224/57791]? If Suprime-Cam candidate, Suprime-Cam designation (NNNNN)meta.idintnullableCl[G] G = spectroscopically confirmed galaxysrc.classcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/436/1172/table5Suprime-Cam globular cluster candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSuName[1224/57791] Suprime-Cam designation (NNNNN)meta.id;meta.mainintprimaryRAJ2000Right Ascension in degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in degrees (J2000)degpos.eq.dec;meta.mainB-V? Suprime-Cam B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.BfloatnullableV-I? Suprime-Cam V-I colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? rms uncertainty on V-Imagstat.error;phot.color;em.opt.VfloatnullableImag? Suprime-Cam I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatnullableRV? Radial velocity (G2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV? rms uncertainty on RVkm/sstat.errorintnullable[Z/H]? Calcium triplet based metallicityphys.abund.Zfloatnullablee_[Z/H]? Error on [Z/H] (lower value)stat.error;src.redshiftfloatnullableE_[Z/H]? Error on [Z/H] (upper value)stat.error;stat.maxfloatnullableNameSpectroscopic designation (G1)meta.idcharACS[11/2507]? if ACS candidate, ACS designation (NNNN)meta.idintnullableCl[GS] G = spectroscopically confirmed galaxy, S = spectroscopically confirmed starsrc.classcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/436/1172/tablea1Spectroscopically confirmed objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDesignation (G1)meta.id;phys.atmol.configuration;meta.maincharprimaryRAJ2000Right Ascension in degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in degrees (J2000)degpos.eq.dec;meta.maing-z? ACS g-z colour indexmagphot.colorfloatnullablee_g-z? rms uncertainty on g-zmagstat.errorfloatnullablezmag? ACS z band magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag? rms uncertainty on zmagmagstat.error;phot.mag;em.opt.Ifloatnullablerhl? ACS half light radius if the object was at our adopted distance of 15.6Mpcpcphys.angSize;srcfloatnullablee_rhl? rms uncertainty in ACS half light radiuspcstat.errorfloatnullableB-V? Suprime-Cam B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.BfloatnullableV-I? Suprime-Cam V-I colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? rms uncertainty on V-Imagstat.error;phot.color;em.opt.VfloatnullableImag? Suprime-Cam I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imagmagstat.error;phot.mag;em.opt.IfloatnullableRVRadial velocity (G2)km/sphys.veloc;pos.heliocentricfloate_RV? rms uncertainty on RVkm/sstat.errorintnullable[Z/H]? Calcium triplet based metallicitylog(Sun)phys.abund.Zfloatnullablee_[Z/H]? Error on [Z/H] (lower value)log(Sun)stat.error;src.redshiftfloatnullableE_[Z/H]? Error on [Z/H] (upper value)log(Sun)stat.error;stat.maxfloatnullableSimbadNameSimbad column added by the CDSmeta.idchar