J/ApJ/914/16ivo://CDS.VizieR/J/ApJ/914/16doi:10.26093/cds/vizier.19140016CDSHughes A.K.Sand D.J.Seth A.Strader J.Voggel K.Dumont A.,Crnojevic D.Caldwell N.Forbes D.A.Simon J.D.Guhathakurta P.,Toloba E.2024-02-06T11:52:18Z2022-12-28T13:12:38ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgalaxiesinfrared-photometryvisible-astronomybroad-band-photometrytwo-color-diagramsproper-motionsradial-velocityWe present a new catalog of 40502 globular cluster (GC) candidates in NGC5128 out to a projected radius of ~150kpc based on data from the Panoramic Imaging Survey of Centaurus and Sculptor, the Gaia Data Release 2, and the NOAO Source Catalog. Ranking these candidates based on the likelihood that they are true GCs, we find that approximately 1900 belong to our top two ranking categories and should be the highest priority for spectroscopic follow-up for confirmation. Taking into account our new data and a vetting of previous GC catalogs, we estimate a total GC population of 1450+/-160 GCs. We show that a substantial number of sources previously argued to be low-velocity GCs are instead foreground stars, reducing the inferred GC velocity dispersion. This work showcases the power of Gaia to identify slightly extended sources at the ~4Mpc distance of NGC 5128, enabling accurate identification of GCs throughout the entire extended halo, not just the inner regions that have been the focus of most previous work.2021ApJ...914...16Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/914/16CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/ApJ/449/592 : NGC 5128 PN. III. (Hui+ 1995)J/AJ/128/723 : Washington Photometry in NGC 5128. II (Harris+, 2004)J/ApJS/150/367 : Globular clusters in NGC 5128 (Peng+, 2004)J/AJ/130/873 : BQS objects in the SDSS DR3 area (Jester+, 2005)J/A+A/450/105 : Properties of 153 Galactic globular clusters (Bica+, 2006)J/AJ/132/2187 : MCT1 phot. of NGC 5128 globular clusters (Harris+, 2006)J/ApJS/171/101 : GCs in the ACS Virgo cluster survey (Jordan+, 2007)J/AJ/134/494 : NGC 5128 GCs UBVRICMT1 phot. & RV (Woodley+, 2007)J/MNRAS/386/1443 : 2dF study of globular clusters in NGC 5128 (Beasley+, 2008)J/MNRAS/396/1075 : GCs in nearby dwarf galaxies. II (Georgiev+, 2009)J/AJ/140/2101 : NGC 5128 globular clusters photometry (Sinnott+, 2010)J/AJ/139/1871 : Kinematics of globulars in NGC 5128 (Woodley+, 2010)J/ApJ/708/1335 : Spectroscopy of globulars in NGC 5128 (Woodley+, 2010)J/MNRAS/416/155 : GCs in five early-type galaxies (Faifer+, 2011)J/AJ/143/84 : New candidate globular clusters in NGC 5128 (Harris+, 2012)J/ApJ/773/L27 : GCs in ACSVCS early-type galaxies (Park+, 2013)J/AJ/148/32 : Globular cluster candidates in NGC 3115 (Jennings+, 2014)J/MNRAS/450/1962 : M60 SLUGGS and Gemini/GMOS combined study (Pota+, 2015)J/ApJ/805/65 : FLAMES obs. of NGC 5128's globular clusters (Taylor+, 2015)J/ApJS/227/12 : NGVS XXV. Virgo GCs photometry (Powalka+, 2016)J/MNRAS/469/3444 : Centaurus A's Baryonic Structures II. (Taylor+, 2017)J/ApJ/872/202 : CFHT ugi photometry of globular clusters in M85 (Ko+, 2019)J/ApJ/899/140 : Gaia Ultracompact Dwarf galaxy candidates (Voggel+, 2020)J/A+A/645/A92 : Dwarf spheroidal galaxies in CenA group (Mueller+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/914/16https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/914/16http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/914/16https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/914/16https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/914/16http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/914/16GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/914/16/table4 (Confirmed globular clusters (GCs) around Cen A)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/914/16/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/914/16/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/914/16/table4?GETtext/xml+votable180.050000true199.54534889-44.157248890.005555555555555556Cone search capability for table J/ApJ/914/16/table5 (Foreground stars that were previously misclassified as GCs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/914/16/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/914/16/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/914/16/table5?GETtext/xml+votable180.050000true200.85879611-42.924206110.005555555555555556Cone search capability for table J/ApJ/914/16/table1 (Catalog of globular cluster candidates in NGC5128)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/914/16/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/914/16/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/914/16/table1?GETtext/xml+votable180.050000true196.24867806-41.813341940.005555555555555556Cone search capability for table J/ApJ/914/16/table2 (Catalog of all PISCeS sources in NGC 5128)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/914/16/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/914/16/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/914/16/table2?GETtext/xml+votable180.050000true196.24400806-41.808378890.0055555555555555565/10813 10815 10858 10901-10902 6/43251 43257-43259 43424 43426-43427 43599-43601 43603 43612-43613 43621 43632 43776 43778https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/914/16?format=asciiOpticalInfrareddefaultJ/ApJ/914/16/table4Confirmed globular clusters (GCs) around Cen ASimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[69900/345370]? "H21" ID from this workmeta.id.crossintnullableNameDiscovery ID, if available (1)meta.id;meta.maincharRefReferences (G1)meta.refcharRAJ2000[199.5/202.5] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-44.2/-42.3] Declination (J2000)degpos.eq.dec;meta.mainRad[0.95/103.8] Radial distancearcminphys.angSizefloatgmag[17.47/22.74]? PISCeS g-band magmagphot.mag;em.opt.Bfloatnullablermag[16.86/21.98]? PISCeS r-band magmagphot.mag;em.opt.RfloatnullableRVel[146/1051]? Radial velocitykm/sphys.veloc;pos.heliocentricintnullablee_RVel[1/256]? Radial velocity errorkm/sstat.error;spect.dopplerVelocintnullabler_RVelRadial velocity reference (G1)meta.ref;pos.framecharNotesNotes (2)meta.notecharJ/ApJ/914/16/table5Foreground stars that were previously misclassified as GCsName3Other namemeta.id.crosscharSimbadNameSimbad column added by the CDSmeta.idcharnullableName2Other namemeta.id.crosscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainRVel[28/594] Radial velocitykm/sphys.veloc;pos.heliocentricinte_RVel[9/232] RVel uncertaintykm/sstat.error;spect.dopplerVelocintr_RVelReference on RVelmeta.ref;pos.framecharpmRA[-50.3/8.28] Gaia DR2 proper motion in RAmas/yrpos.pm;pos.eq.rafloate_pmRA[0.15/3.23] pmRA uncertaintymas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-14/2.3] Gaia DR2 proper motion in decl.mas/yrpos.pm;pos.eq.decfloate_pmDE[0.13/4.16] pmDE uncertaintymas/yrstat.error;pos.pm;pos.eq.decfloatplx[-2.24/2.26] Gaia DR2 parallaxmaspos.parallax.trigfloate_plx[0.07/1.55] plx uncertaintymasstat.error;pos.parallaxfloatNameDiscovery ID, if availablemeta.id;meta.maincharr_NameReference on Name (G1)meta.ref;pos.framecharr_Name2Reference on Name2 (G1)meta.ref;pos.framecharr_Name3Reference on Name3 (G1)meta.ref;pos.framecharName4Other namemeta.id.crosscharr_Name4Reference on Name4 (G1)meta.ref;pos.framecharName5Other namemeta.id.crosscharr_Name5Reference on Name5 (G1)meta.ref;pos.framecharNote[1/2]? Note (1)meta.noteintnullableGaiaDisplay data from Gaia DR2 (I/345) and Gaia DR3 (I/355) within 0.5"meta.ref.urlcharJ/ApJ/914/16/table1Catalog of globular cluster candidates in NGC5128ID[46/474905] "H21" ID from this workmeta.id;meta.mainintRAJ2000[196.2/204.5] PISCeS right ascension (J2000) (RA)degpos.eq.ra;meta.mainindexedDEJ2000[-45.5/-40.8] PISCeS declination (J2000) (DEC)degpos.eq.dec;meta.mainindexedgmag[0/24.8] PISCeS g-band magnitude (PISCES_GMAG)magphot.mag;em.opt.Bfloate_gmag[0.01/0.8] Uncertainty on the gmag (PISCES_GMAG_ERR)magstat.error;phot.magfloatrmag[0/24.2] PISCeS r-band magnitude (PISCES_RMAG)magphot.mag;em.opt.RfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDiscovery ID, if available (DISCOVERY_ID)meta.id.crosschare_rmag[0.01/2.1] Uncertainty on the rmag (PISCES_RMAG_ERR)magstat.error;phot.magfloatC3-6[1/31.3] Concentration index value, C_3-6_; see Section 4.2 (C_3_6)magphot.mag;arith.difffloatpmRA[-17.5/15.7]? Gaia DR2 proper motion in RA direction (pmRA*cosDE) (PM_RA)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA[0.1/5.2]? pmRA uncertainty (PM_RA_ERR)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-15.4/10.8]? Gaia DR2 proper motion in decl. direction (PM_DEC)mas/yrpos.pm;pos.eq.decfloatnullablee_pmDE[0.1/5]? pmDE uncertainty (PM_DEC_ERR)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableplx[-5.8/7.2]? Gaia DR2 parallax (PARALLAX)maspos.parallax.trigfloatnullablee_plx[0.08/4]? Parallax uncertainty (PARALLAX_ERR)masstat.error;pos.parallaxfloatnullableNoise[0/20]? Gaia DR2 astrometric excess noise, see Section 4.4.2 (AEN)masstat.snr;instr.det.noisefloatnullableE(BP-RP)[0.6/5]? Gaia DR2 BP/RP excess factor (BR_EXCESS)magphot.color.excessfloatnullable(u-r)0[-0.84/8.84]? NSC (u-r)_0_ color index (UR_COLOR)magphot.color;em.opt.U;em.opt.Rfloatnullable(r-z)0[-5.7/6.1]? NSC (r-z)_0_ color index (RZ_COLOR)magphot.color;em.opt.R;em.opt.IfloatnullableLC3-6[0.84/1] Candidate likelihood based on C_3-6_ (CONCENTRATION_LIKELIHOOD)stat.likelihoodfloatLpm[0.0003/1]? Candidate likelihood based on proper motion (PROPER_MOTION_LIKELIHOOD)stat.likelihoodfloatnullableLplx[0.002/1]? Candidate likelihood based on parallax (PARALLAX_LIKELIHOOD)stat.likelihoodfloatnullableLNoise[0.023/1]? Candidate likelihood based on AEN (AEN_LIKELIHOOD)stat.likelihooddoublenullableLEx[0.023/1]? Candidate likelihood based on BR_excess_ (BRE_LIKELIHOOD)stat.likelihooddoublenullableLcol[0.023/1]? Candidate likelihood based on NSC color (COLOR_LIKELIHOOD)stat.likelihooddoublenullableTotL[5.8e-11/1] Total likelihood of candidate being a GC in NGC 5128 (TOTAL_LIKELIHOOD)stat.likelihooddoubleRankClassification based on data availability in key data sets (CANDIDATE_RANK)meta.code.qualcharConf[ny] Is it a confirmed GC in NGC 5128? (CONFIRMED)meta.codecharRefReference(s) (REFERENCES) (G1)meta.ref;pos.framecharJ/ApJ/914/16/table2Catalog of all PISCeS sources in NGC 5128umagNSC[13.88/24.43]? NSC u-band magnitude (NSC_UMAG)magphot.mag;em.opt.Ufloatnullablee_umagNSC[0.003/0.3]? umagNSC uncertainty (NSC_UMAG_ERR)magstat.error;pos.cartesian.xfloatnullablegmagNSC[18/22]? NSC g-band magnitude (NSC_GMAG)magphot.mag;em.opt.Bfloatnullablee_gmagNSC[0.0008/0.3]? gmagNSC uncertainty (NSC_GMAG_ERR)magstat.errorfloatnullablermagNSC[14.1/22.4]? NSC r-band magnitude (NSC_RMAG)magphot.mag;em.opt.Rfloatnullablee_rmagNSC[0.0002/0.3]? rmagNSC uncertainty (NSC_RMAG_ERR)magstat.errorfloatnullableimagNSC[13.6/22.8]? NSC i-band magnitude (NSC_IMAG)magphot.mag;em.opt.Ifloatnullablee_imagNSC[0.0003/0.3]? imagNSC uncertainty (NSC_IMAG_ERR)magstat.errorfloatnullablezmagNSC[12.6/22.9]? NSC z-band magnitude (NSC_ZMAG)magphot.mag;em.opt.Ifloatnullablee_zmagNSC[0.0007/0.3]? zmagNSC uncertainty (NSC_ZMAG_ERR)magstat.errorfloatnullable(u-r)0[-77.2/81]? NSC (u-r)_0_ color index (UR_COLOR)magphot.color;em.opt.U;em.opt.Rfloatnullable(r-z)0[-79.4/81.6]? NSC (r-z)_0_ color index (RZ_COLOR)magphot.color;em.opt.R;em.opt.IfloatnullableLC3-6[0/1] Candidate likelihood based on C_3-6_ (CONCENTRATION_LIKELIHOOD)stat.likelihoodfloatCheck[0/1] Galaxy/blend check (STRUCTURE_CHECK)meta.codefloatC3-6g[-326/55] PISCeS g-band concentration index value (G_C_3_6)magphot.mag;arith.difffloatRefReference (s) (REFERENCES) (G1)meta.ref;pos.framecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/474916] A unique "H21" ID which we assignmeta.id;meta.mainintprimaryNameDiscovery ID, if available (DISCOVERY_ID)meta.id.crosscharRAJ2000[196.2/204.5]? PISCeS right ascension (J2000) (RA)degpos.eq.ra;meta.mainnullableindexedDEJ2000[-45.5/-40.8] PISCeS declination (J2000) (DEC)degpos.eq.dec;meta.mainindexedgmag[0/28.05] PISCeS g-band magnitude (PISCES_GMAG)magphot.mag;em.opt.Bfloate_gmag[0.01/3] Uncertainty on the gmag (PISCES_GMAG_ERR)magstat.error;phot.magfloatrmag[0/25.6] PISCeS r-band magnitude (PISCES_RMAG)magphot.mag;em.opt.Rfloate_rmag[0.01/2.1] Uncertainty on the rmag (PISCES_RMAG_ERR)magstat.error;phot.magfloatC3-6r[-67/423] PISCeS r-band concentration index value (R_C_3_6)magphot.mag;arith.difffloatBand[gr] PISCeS magnitude band used to calculate concentration_likeliness (BAND_USED)meta.code;instr.filtercharRAGdeg[196.2/204.5]? Gaia DR2 right ascension (ICRS) (GAIA_RA)degpos.eq.ranullableDEGdeg[-45.5/-40.8]? Gaia DR2 declination (ICRS) (GAIA_DEC)degpos.eq.decnullablepmRA[-99.2/138.4]? Gaia DR2 proper motion in RA (PM_RA)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA[0.05/5.4]? pmRA uncertainty (PM_RA_ERR)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-159.61/86.7]? Gaia DR2 proper motion in decl. (PM_DEC)mas/yrpos.pm;pos.eq.decfloatnullablee_pmDE[0.05/5.2]? pmDE uncertainty (PM_DEC_ERR)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableplx[-23.7/29.3]? Gaia DR2 parallax (PARALLAX)maspos.parallax.trigfloatnullablee_plx[0.03/4.1]? Parallax uncertainty (PARALLAX_ERR)masstat.error;pos.parallaxfloatnullableNoise[0/20]? Gaia DR2 astrometric excess noise, see Section 4.4.2 (AEN)stat.snr;instr.det.noisefloatnullableE(BP-RP)[0.2/5]? Gaia DR2 BP/RP excess factor (BR_EXCESS)magphot.color.excessfloatnullableLpm[0/1]? Candidate likelihood based on proper motion (PROPER_MOTION_LIKELIHOOD)stat.likelihoodfloatnullableLplx[0/1]? Candidate likelihood based on parallax (PARALLAX_LIKELIHOOD)stat.likelihoodfloatnullableLNoise[0.023/1]? Candidate likelihood based on AEN (AEN_LIKELIHOOD)stat.likelihooddoublenullableLEx[0.023/1]? Candidate likelihood based on BR_excess_ (BRE_LIKELIHOOD)stat.likelihooddoublenullableLcol[-1/1]? Candidate likelihood based on NSC color (COLOR_LIKELIHOOD)stat.likelihooddoublenullableTotL[0/1] Total likelihood of candidate being a GC in NGC 5128 (TOTAL_LIKELIHOOD)stat.likelihoodfloatRankClassification based on data availability in key data sets; see Section 3 (CANDIDATE_RANK)meta.code.qualcharConf[ny] Is it a confirmed GC in NGC 5128? (CONFIRMED)meta.codecharGaiaDisplay data from Gaia DR2 (I/345) and Gaia DR3 (I/355) within 0.5"meta.ref.urlchar