J/AJ/143/52ivo://CDS.VizieR/J/AJ/143/52doi:10.26093/cds/vizier.51430052CDSStrader J.Seth A.C.Caldwell N.2017-06-13T11:08:19Z2013-05-02T09:37:39ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustershst-photometryradial-velocityastronomical-object-identificationWe use Hubble Space Telescope imaging to show that the nearby dwarf starburst galaxy NGC 4449 (=UGC 7592) has an unusual abundance of luminous red star clusters. Joint constraints from integrated photometry, low-resolution spectroscopy, dynamical mass-to-light ratios, and resolved color-magnitude diagrams provide evidence that some of these clusters are old globular clusters (GCs). Spectroscopic data for two massive clusters suggest intermediate metallicities ([Fe/H]~-1) and subsolar Mg enhancement ([Mg/Fe]~-0.1 to -0.2). One of these clusters may be the nucleus of a tidally disrupting dwarf galaxy; the other is very massive (~3*10^6^M_{sun}_). We have also identified a population of remote halo GCs. NGC 4449 is consistent with an emerging picture of the ubiquity of stellar halos among dwarf galaxies, and study of its GCs may help distinguish between accretion and in situ scenarios for such halos.2012AJ....143...52Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/52CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)J/AJ/141/61 : Star clusters in M31. II. (Caldwell+, 2011)J/AJ/142/129 : HST photometry of NGC 4449 clusters (Annibali+, 2011)J/ApJ/741/86 : XRBs and star clusters in NGC 4449 (Rangelov+, 2011)J/MNRAS/392/879 : Globular clusters in nearby dwarf galaxies (Georgiev+, 2009)J/AZh/85/794 : UBVRH{alpha} photometry on 5 galaxies (Gusev+, 2008)J/AJ/124/3157 : Velocities in NGC 4449 (Valdez-Gutierrez+, 2002)J/A+AS/139/491 : BVI photometry of nearby galaxies (Makarova+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/52https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/52http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/52https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/143/52https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/143/52http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/143/52GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/143/52/table1 (HST/ACS star cluster photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/52/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/52/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/52/table1?GETtext/xml+votable180.050000true187.112666744.11680560.005555555555555556Cone search capability for table J/AJ/143/52/table3 (Heliocentric radial velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/52/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/52/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/52/table3?GETtext/xml+votable180.050000true187.112666744.11680560.005555555555555556Cone search capability for table J/AJ/143/52/sdss_cl (SDSS candidate globular clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/143/52/sdss_cl?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/143/52/sdss_cl?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/143/52/sdss_cl?GETtext/xml+votable180.050000true187.114216144.04462190.0055555555555555566/109112.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/143/52?format=asciiOpticaldefaultJ/AJ/143/52/table1HST/ACS star cluster photometryRAdeg[186.97/187.113] Right Ascension (J2000)degpos.eq.raDEdeg[44.0529/44.1440] Declination (J2000)degpos.eq.decAper[0.39/2.8] Aperture radius for photometryarcsecphys.angSizefloatRh[0.1/0.9] Half-light radius direct estimatearcsecphys.angSizefloatVmag[15.46/22.9] HST/ACS F555W band magnitude (2)magphot.mag;em.opt.Vfloate_VmagUncertainty in F555W (2)magstat.error;phot.mag;em.opt.VfloatB-V(F435W-F555W) color index (2)magphot.color;em.opt.B;em.opt.VfloatV-I(F555W-F814W) color index (2)magphot.color;em.opt.V;em.opt.IfloatAgePhotometric cluster age: "Young" (<~1Gyr) or "Old"meta.notecharG01? Gelatt et al. (2001PASP..113..142G) identifier (<[GHG2001] NN> in Simbad) (4)meta.id.crossintnullableA11? Annibali et al. (Cat. J/AJ/142/129) identifier (<[ATA2011] NN> in Simbad) (4)meta.id.crossintnullablef_A11[SSC] SSC: central super star clustermeta.codecharR11? Rangelov et al. (Cat. J/ApJ/741/86) identifier (<[RPC2011] NNN> in Simbad) (4)meta.id.crossintnullableVdisplay HRV data for this object (table 3)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintC[CP] Confirmed or Possible cluster (C or P)meta.code.qualcharIDCluster identification (A = East HST/ACS pointing; B = West HST/ACS pointing) <[SSC2012] ANN> in Simbad (1)meta.id;meta.maincharprimaryJ/AJ/143/52/table3Heliocentric radial velocitiesDEdeg[43.9875/44.2173] Declination (J2000)degpos.eq.decHRV[103.5/299.4] Heliocentric radial velocitieskm/sspect.dopplerVeloc;pos.heliocentricfloate_HRVUncertainty on HRVkm/sstat.errorfloatf_HRV[SC] Source (S or C) (2)meta.codecharSimbadSimbad column added by the CDSmeta.refchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAdeg[186.946/187.207] Right Ascension (J2000)degpos.eq.raIDCluster identification (1)meta.id;meta.maincharJ/AJ/143/52/sdss_clSDSS candidate globular clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDCluster candidate identification (1)meta.id;meta.maincharprimaryRAdeg[186.8947/187.2062] Right Ascension (J2000)degpos.eq.raDEdeg[43.9875/44.2173] Declination (J2000)degpos.eq.decumag[19.97/22.62] SDSS u magnitudemagphot.mag;em.opt.Ufloate_umagUncertainty on u magnitudemagstat.error;phot.mag;em.opt.Ufloatgmag[18.84/20.82] SDSS g magnitudemagphot.mag;em.opt.Bfloate_gmagUncertainty on g magnitudemagstat.error;phot.mag;em.opt.Bfloatrmag[18.31/20.3] SDSS r magnitudemagphot.mag;em.opt.Rfloate_rmagUncertainty on r magnitudemagstat.error;phot.mag;em.opt.Rfloatimag[18.14/20.68] SDSS i magnitudemagphot.mag;em.opt.Ifloate_imagUncertainty on i magnitudemagstat.error;phot.mag;em.opt.Ifloatzmag[18.11/21.02] SDSS z magnitudemagphot.mag;em.opt.Ifloate_zmagUncertainty on z magnitudemagstat.error;phot.mag;em.opt.IfloatC[1/5]? cluster classification (2)meta.code.qualintnullableVdisplay radial velocity data for this object (table 3)meta.ref.urlcharSDSSDisplay the data from the photometric SDSS-DR6 and -DR9 catalogs within 1.5"meta.ref.urlcharSloanDisplay the SDSS online data for this objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main