J/MNRAS/469/3444ivo://CDS.VizieR/J/MNRAS/469/3444doi:10.26093/cds/vizier.74693444CDSTaylor M.A.Puzia T.H.Munoz R.P.Mieske S.Lancon A.Zhang H.,Eigenthaler P.Bovill M.S.2024-08-17T20:19:21Z2018-01-17T08:19:45ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvisible-astronomysloan-photometryastrometryNew wide-field u'g'r'i'z' Dark Energy Camera observations centred on the nearby giant elliptical galaxy NGC 5128 covering ~21 deg^2^ are used to compile a new catalogue of ~3200 globular clusters (GCs). We report 2404 newly identified candidates, including the vast majority within ~140kpc of NGC 5128. We find evidence for a transition at a galactocentric radius of R_gc_~=55kpc from GCs 'intrinsic' to NGC 5128 to those likely to have been accreted from dwarf galaxies or that may transition to the intragroup medium of the Centaurus A galaxy group. We fit power-law surface number density profiles of the form {Sigma}_N,R_gc_{prop.to}R_gc_^{Gamma}^ and find that inside the transition radius, the red GCs are more centrally concentrated than the blue, with {Gamma}_inner,red_~=-1.78 and {Gamma}_inner,blue_~=-1.40, respectively. Outside this region both profiles flatten, more dramatically for the red GCs ({Gamma}_outer,red_~=-0.33) compared to the blue ({Gamma}_outer,blue_~= -0.61), although the former is more likely to suffer contamination by background sources. The median (g'-z')_0_=1.27mag colour of the inner red population is consistent with arising from the amalgamation of two giant galaxies each less luminous than present-day NGC 5128. Both inwards and outwards of the transition radius, we find the fraction of blue GCs to dominate over the red GCs, indicating a lively history of minor mergers. Assuming the blue GCs to originate primarily in dwarf galaxies, we model the population required to explain them, while remaining consistent with NGC 5128's present-day spheroid luminosity. We find that several dozen dwarfs of luminosities L_dw,V_~= 10^6-9.3^L_V,{sun}_, following a Schechter luminosity function with a faint-end slope of -1.50<={alpha}<=-1.25 is favoured, many of which may have already been disrupted in NGC 5128's tidal field.2017MNRAS.469.3444Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/469/3444CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/143/84 : New candidate globular clusters in NGC 5128 (Harris+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/469/3444https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/469/3444http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/469/3444https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/469/3444https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/469/3444http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/469/3444GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/469/3444/psc (Point and point-like sources photometry (tables 2 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3444/psc?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3444/psc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3444/psc?GETtext/xml+votable180.050000true197.6612917-42.29783610.005555555555555556Cone search capability for table J/MNRAS/469/3444/gc (Globular cluster candidates sources photometry (tables 4 and 5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/3444/gc?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/3444/gc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/3444/gc?GETtext/xml+votable180.050000true197.69-42.30614440.0055555555555555565/10813-10815 10856 10858 10900-10902 6/43249 43251 43612-43613 43776 43778https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/469/3444?format=asciiOpticaldefaultJ/MNRAS/469/3444/pscPoint and point-like sources photometry (tables 2 and 3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainindexedDEJ2000Declination (J2000)pos.eq.dec;meta.mainumagu-band apparent magnitudemagphot.mag;em.opt.Ufloatgmagg-band apparent magnitudemagphot.mag;em.opt.Bfloatrmagr-band apparent magnitudemagphot.mag;em.opt.Rfloatimagi-band apparent magnitudemagphot.mag;em.opt.Ifloatzmagz-band apparent magnitudemagphot.mag;em.opt.Ifloate_umagStatistical error on u-band magnitudemagstat.error;phot.mag;em.opt.Ufloats_umagSystematic error on u-band magnitudemagstat.error;phot.mag;em.opt.Ufloate_gmagStatistical error on g-band magnitudemagstat.error;phot.mag;em.opt.Bfloats_gmagSystematic error on g-band magnitudemagstat.error;phot.magfloate_rmagStatistical error on r-band magnitudemagstat.error;phot.mag;em.opt.Rfloats_rmagSystematic error on r-band magnitudemagstat.error;phot.magfloate_imagStatistical error on i-band magnitudemagstat.error;phot.mag;em.opt.Ifloats_imagSystematic error on i-band magnitudemagstat.error;phot.magfloate_zmagStatistical error on z-band magnitudemagstat.error;phot.mag;em.opt.Ifloats_zmagSystematic error on z-band magnitudemagstat.error;phot.magfloatJ/MNRAS/469/3444/gcGlobular cluster candidates sources photometry (tables 4 and 5)T17IDHomogenized designation, T17-NNNNmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintoldIDOlder designations (1)meta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainProbConfidence of being true GCstat.fit.goodnessfloatRgcAngular distance from NGC5128arcminpos.angDistancefloatPAPosition angle from NGC5128 (N of E)degpos.posAngfloatumagu-band apparent magnitudemagphot.mag;em.opt.Ufloatgmagg-band apparent magnitudemagphot.mag;em.opt.Bfloatrmagr-band apparent magnitudemagphot.mag;em.opt.Rfloatimagi-band apparent magnitudemagphot.mag;em.opt.Ifloatzmagz-band apparent magnitudemagphot.mag;em.opt.Ifloate_umag? Statistical error on u-band magnitudemagstat.error;phot.mag;em.opt.Ufloatnullables_umag? Systematic error on u-band magnitudemagstat.error;phot.mag;em.opt.Ufloatnullablee_gmag? Statistical error on g-band magnitudemagstat.error;phot.mag;em.opt.Bfloatnullables_gmag? Systematic error on g-band magnitudemagstat.error;phot.magfloatnullablee_rmag? Statistical error on r-band magnitudemagstat.error;phot.mag;em.opt.Rfloatnullables_rmag? Systematic error on r-band magnitudemagstat.error;phot.magfloatnullablee_imag? Statistical error on i-band magnitudemagstat.error;phot.mag;em.opt.Ifloatnullables_imag? Systematic error on i-band magnitudemagstat.error;phot.magfloatnullablee_zmag? Statistical error on z-band magnitudemagstat.error;phot.mag;em.opt.Ifloatnullables_zmag? Systematic error on z-band magnitudemagstat.error;phot.magfloatnullable