J/ApJ/835/123ivo://CDS.VizieR/J/ApJ/835/123doi:10.26093/cds/vizier.18350123CDSLim S.Peng E.W.Duc P.-A.Fensch J.Durrell P.R.Harris W.E.,Cuillandre J.-C.Gwyn S.Lancon A.Sanchez-Janssen R.2017-10-26T12:18:33Z2017-09-11T15:41:54ZCDS support team

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

cds-question@unistra.frglobular-star-clustersinfrared-photometryvisible-astronomybroad-band-photometrygalaxiesGlobular clusters (GCs) are some of the most visible tracers of the merging and accretion histories of galaxy halos. Metal-poor GCs, in particular, are thought to arrive in massive galaxies largely through dry, minor merging events, but it is rare to see a direct connection between GCs and visible stellar streams. NGC 474 is a post-merger early-type galaxy with dramatic fine structures made of concentric shells and radial streams that have been more clearly revealed by deep imaging. We present a study of GCs in NGC 474 to better establish the relationship between merger-induced fine structure and the GC system. We find that many GCs are superimposed on visible streams and shells, and about 35% of GCs outside 3R_e,galaxy_ are located in regions of fine structure. The spatial correlation between GCs and fine structure is significant at the 99.9% level, which shows that this correlation is not coincidental. The colors of GCs on fine structures are mostly blue, and we also find an intermediate-color population that is dominant in the central region and that will likely passively evolve to have colors consistent with a traditional metal-rich GC population. The association of the blue GCs with fine structures is direct confirmation that many metal-poor GCs are accreted onto massive galaxy halos through merging events and that the progenitors of these mergers are sub-L^*^ galaxies.2017ApJ...835..123Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/835/123CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/cfht : Log of CFHT Exposures (CADC, 1979-)J/ApJ/681/197 : ACS Virgo Cluster Survey. XV (Peng+, 2008)J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011)J/ApJ/773/L27 : GCs in ACSVCS early-type galaxies (Park+, 2013)J/MNRAS/428/389 : SLUGGS GCs in early-type galaxies (Pota+, 2013)J/MNRAS/446/120 : ATLAS3D project. XXIX (Duc+, 2015)J/MNRAS/448/3484 : ATLAS3D Project. XXX (McDermid+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/835/123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/835/123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/835/123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/835/123https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/835/123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/835/123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/835/123/table1 (A catalog of the globular clusters in NGC 474)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/835/123/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/835/123/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/835/123/table1?GETtext/xml+votable180.050000true19.934253.42705560.0055555555555555566/18209https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/835/123?format=asciiInfraredOpticaldefaultJ/ApJ/835/123/table1A catalog of the globular clusters in NGC 474recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqRunning sequence numbermeta.id;meta.mainintRAJ2000[1] Hour of Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[3] Degree of Declination (J2000)pos.eq.dec;meta.maingmag0[18.9/25] The dereddened CFHT g-band AB magnitudemagphot.mag;em.opt.Bfloate_gmag0[0.001/0.09] Uncertainty in gmag0magstat.error;phot.magfloat(u-g)0[0.8/2] The dereddened (u-g) color indexmagphot.color;em.opt.U;em.opt.Bfloate_(u-g)0[0.002/0.5] Uncertainty in (u-g)0magstat.errorfloat(g-r)0[0.2/1] The dereddened (g-r) color indexmagphot.color;em.opt.B;em.opt.Rfloate_(g-r)0[0.001/0.2] Uncertainty in (g-r)0magstat.errorfloat(g-i)0[0.5/1.2] The dereddened (g-i) color indexmagphot.color;em.opt.B;em.opt.Rfloate_(g-i)0[0.001/0.2] Uncertainty in (g-i)0magstat.errorfloat