J/AJ/149/157ivo://CDS.VizieR/J/AJ/149/157doi:10.26093/cds/vizier.51490157CDSMa J.2017-12-22T05:33:02Z2015-06-08T12:59:51ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustersphotometrymetallicityIn this paper, we present the properties of 10 halo globular clusters (GCs) with luminosities L~=5-7x10^5^L_{sun}_ in the Local Group galaxy M33 using images from the Hubble Space Telescope WFPC2 in the F555W and F814W bands. We obtained the ellipticities, position angles, and surface brightness profiles for each GC. In general, the ellipticities of the M33 sample clusters are similar to those of the M31 clusters. The structural and dynamical parameters are derived by fitting the profiles to three different models combined with mass-to-light ratios (M/L values) from population-synthesis models. The structural parameters include core radii, concentration, half-light radii, and central surface brightness. The dynamical parameters include the integrated cluster mass, integrated binding energy, central surface mass density, and predicted line of sight velocity dispersion at the cluster center. The velocity dispersions of the four clusters predicted here agree well with the observed dispersions by Larsen et al. The results here showed that the majority of the sample halo GCs are better fitted by both the King model and the Wilson model than the Sersic model. In general, the properties of the clusters in M33, M31, and the Milky Way fall in the same regions of parameter spaces. The tight correlations of cluster properties indicate a "fundamental plane" for clusters, which reflects some universal physical conditions and processes operating at the epoch of cluster formation.2015AJ....149..157Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/157CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/202 : Globular Clusters in the Milky Way (Harris, 1997)J/AJ/146/20 : Structural parameters for 79 GCs in M31 (Wang+, 2013)J/AJ/145/88 : UBVRI photometry of M33 star clusters. II. (Ma, 2013)J/MNRAS/426/2427 : M33 star clusters structural parameters (San Roman+, 2012)J/AJ/144/41 : UBVRI photometry of M33 star clusters. I. (Ma+, 2012)J/ApJ/700/103 : Ages of star clusters in M33 (Park+, 2009)J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)J/ApJS/122/431 : Star Clusters in M33 (Chandar+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/157https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/149/157http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/149/157https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/149/157https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/149/157http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/149/157GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/149/157/table1 (Integrated measurements of 10 halo globular clusters in M33)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/149/157/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/149/157/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/149/157/table1?GETtext/xml+votable180.050000true23.437916730.79630560.0055555555555555566/2154 2155https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/149/157?format=asciiOpticaldefaultJ/AJ/149/157/table1Integrated measurements of 10 halo globular clusters in M33recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster identifiermeta.id;meta.maincharprimaryNvNumber of points for the profile in V-band (F555W)meta.numberintnullableNiNumber of points for the profile in I-band (F814W)meta.numberintnullableProfPlot of cluster profile in surface intensitymeta.ref.urlcharEll1[0/0.4] Ellipticity of the F555W filtersrc.ellipticityfloate_Ell1[0.01/0.04] Uncertainty in Ell1stat.error;src.ellipticityfloatPA1[-36/43] Position angle {theta} of the F555W filterdegpos.posAnginte_PA1[2/27] Uncertainty in PA1degstat.error;pos.posAngintEll2[0.1/0.3] Ellipticity of the F814W filtersrc.ellipticityfloate_Ell2[0.01/0.05] Uncertainty in Ell2stat.error;src.ellipticityfloatPA2[-63/40] Position angle {theta} of the F814W filterdegpos.posAnginte_PA2[1/17] Uncertainty in PA2degstat.error;pos.posAngintBmagCluster B-band magnitudemagphot.mag;em.opt.BfloatVmagCluster V-band magnitudemagphot.mag;em.opt.VfloatImagCluster I-band magnitudemagphot.mag;em.opt.IfloatRgc[0.6/4.4] Cluster galactocentric distancepos.distance;pos.galactocentricfloatE(B-V)[0/0.4] The (B-V) color excessmagphot.color.excess;em.opt.B;em.opt.Vfloat[Fe/H][-2.2/-0.2] Cluster metallicitylog(Sun)phys.abund.Zfloate_[Fe/H][0.04/0.11] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.FefloatAge[1.2/18.7] Cluster ageGyrtime.agefloate_Age[0.05/0.41] Uncertainty in AgeGyrstat.error;time.agefloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.mainJ/AJ/149/157/table2Intensity profiles for 10 halo globular clusters in M33recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster identifiermeta.id;meta.maincharBandBand used in the observation (F555W or F814W)instr.setup;obscharRad[0/13] Cluster-centric radiusarcsecphys.size.radiusfloatInt[-7/61415] Final, calibrated intensity (1)solLum.pc**-2phot.flux.sbdoublee_Int[0.06/1662] Uncertainty in IntsolLum.pc**-2stat.error;phot.flux.sbdoublef_IntProfile flag (OK, BAD, or DEP) (2)meta.code;obschar