J/AJ/138/1667ivo://CDS.VizieR/J/AJ/138/1667doi:10.26093/cds/vizier.51381667CDSBarmby P.Perina S.Bellazzini M.Cohen J.G.Hodge P.W.Huchra J.P.,Kissler-Patig M.Puzia T.H.Strader J.2017-06-26T11:50:43Z2012-02-16T10:45:15ZCDS support team

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

cds-question@unistra.frglobular-star-clustershst-photometryastronomical-modelssurface-photometrySurface brightness profiles for 23 M31 star clusters were measured using images from the Wide Field Planetary Camera 2 on the Hubble Space Telescope, and fitted to two types of models to determine the clusters' structural properties. The clusters are primarily young (~108yr) and massive (~104.5M_{sun}_), with median half-light radius 7pc and dissolution times of a few Gyr. The properties of the M31 clusters are comparable to those of clusters of similar age in the Magellanic Clouds. Simulated star clusters are used to derive a conversion from statistical measures of cluster size to half-light radius so that the extragalactic clusters can be compared to young massive clusters in the Milky Way. All three sets of star clusters fall approximately on the same age-size relation. The young M31 clusters are expected to dissolve within a few Gyr and will not survive to become old, globular clusters. However, they do appear to follow the same fundamental plane (FP) relations as old clusters; if confirmed with velocity dispersion measurements, this would be a strong indication that the star cluster FP reflects universal cluster formation conditions.2009AJ....138.1667Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1667CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/531/A155 : HST photometry in six M31 globular clusters (Perina+, 2011)J/A+A/507/1375 : HST/ACS VI data of M31 globular clusters (Perina+, 2009)J/AJ/138/770 : HST/WFPC survey of M31 bright young clusters (Hodge+, 2009)J/AJ/137/94 : Star clusters in M31 (Caldwell+, 2009)J/A+A/483/769 : HST VI photometry of 3 globulars in M31 (Fuentes-Carrera+,J/A+A/471/127 : New globular clusters in M31 (Galleti+, 2007)J/A+A/416/917 : Revised Bologna Catalog of M31 globular clusters (Galleti+,J/ApJ/559/851 : Young star cluster candidates in M31 (Williams+, 2001)J/AJ/122/2458 : M31 globular clusters from HST (Barmby+, 2001)J/AJ/114/1488 : Globulars in M31 (Holland+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/138/1667https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/138/1667http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/138/1667https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/138/1667https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/138/1667http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/138/1667GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/138/1667/table1 (Data sets for M31 young clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/138/1667/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/138/1667/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/138/1667/table1?GETtext/xml+votable180.050000true10.2614583341.11010.0055555555555555566/2622 2623 2666 2708 2709 2752https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/138/1667?format=asciidefaultJ/AJ/138/1667/table1Data sets for M31 young clustersSimbadNameSimbad column added by the CDSmeta.idcharExp2Exposure time 2stime.expointrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster name (G1)meta.id;meta.maincharprimaryf_Name[*] *: B195D = VDB0 (in table 1 of the paper)meta.codecharSet1Data set 1meta.idcharSet2Data set 2meta.idcharFilt1[F439W/F450W] Filter 1meta.code;instr.filtercharExp1Exposure time 1stime.expointFilt2[F555W/F814W] Filter 2meta.code;instr.filtercharE(B-V)Color excessmagphot.color.excessfloatlogAgeAssumed age (1)log(yr)time.agefloatrBolDisplay the Revised Bologna Catalog of M31 globular clusters (Galetti et al., 2004, Cat. J/A+A/416/917)meta.ref.urlchar_RAPositions from the Revised Bologna Catalog of M31 globular clusters (Galetti et al., 2004, Cat. J/A+A/416/917) (right ascension part)degpos.eq.ra;meta.main_DEPositions from the Revised Bologna Catalog of M31 globular clusters (Galetti et al., 2004, Cat. J/A+A/416/917) (declination part)degpos.eq.dec;meta.mainJ/AJ/138/1667/clustersM31 young clusters: basic parameters, derived structural, photometric and dynamical parametersE_cUpper 68% confidence interval in cstat.error;stat.maxfloate_V-XError in V-Xmagstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (G1)meta.id;meta.maincharFiltFilter (F439W, F450W, F555W or F814W)meta.id;instr.filtercharNptsNumber of pointsmeta.numberintModel[K66/W ] Model code (G2)meta.code;stat.param;meta.modelledcharchi2Unreduced {chi}^2^ of best-fitting modelstat.fit.chi2floatIbkgModel-fit background intensity (1)solLum.pc**-2instr.backgroundfloate_Ibkg? Error in IbkgsolLum.pc**-2stat.errorfloatnullableW0Model-fit central potential (dimensionless, measures degree of central concentration)stat.fit.paramfloatE_W0Upper 68% confidence interval in W0stat.error;stat.maxfloate_W0Lower 68% confidence interval in W0stat.errorfloatcModel-fit concentration (2)meta.notefloate_cLower 68% confidence interval in cstat.errorfloatmu0Model-fit central surface brightnessmag.arcsec**-2phot.mag.sbfloatE_mu0Upper 68% confidence interval in mu0mag.arcsec**-2stat.error;stat.maxfloate_mu0Lower 68% confidence interval in mu0mag.arcsec**-2stat.errorfloatlogAr0Log of model-fit angular scale radiuslog(arcsec)phys.angSize;srcfloatE_logAr0Upper 68% confidence interval in logAr0log(arcsec)stat.error;stat.maxfloate_logAr0Lower 68% confidence interval in logAr0log(arcsec)stat.errorfloatlogPr0Log of model-fit physical scale radiuslog(pc)phys.size.radius;instr.scalefloatE_logPr0Upper 68% confidence interval in logPr0log(pc)stat.error;stat.maxfloate_logPr0Lower 68% confidence interval in logPr0log(pc)stat.errorfloatV-XThe (V-Filt) color indexmagphot.color;em.opt;em.optfloatlogrtLog of model tidal radiuslog(pc)phys.size.radius;meta.modelledfloatE_logrtUpper 68% confidence interval in logrtlog(pc)stat.error;stat.maxfloate_logrtLower 68% confidence interval in logrtlog(pc)stat.errorfloatlogRcLog of model projected core radius (1)log(pc)phys.size.radiusfloatE_logRcUpper 68% confidence interval in logRclog(pc)stat.error;stat.maxfloate_logRcLower 68% confidence interval in logRclog(pc)stat.errorfloatlogRhLog of model projected half-light radiuslog(pc)phys.size.radiusfloatE_logRhUpper 68% confidence interval in logRhlog(pc)stat.error;stat.maxfloate_logRhLower 68% confidence interval in logRhlog(pc)stat.errorfloatlogRh/RcLog of half-light to projected core radii (2)phys.size.radius;arith.ratiofloatE_logRh/RcUpper 68% confidence interval in logRh/Rcstat.error;stat.maxfloate_logRh/RcLower 68% confidence interval in logRh/Rcstat.errorfloatlogI0Log of model central luminosity surface density in the V bandlog(solLum.pc**-2)phys.luminosityfloatE_logI0Upper 68% confidence interval in logI0log(solLum.pc**-2)stat.error;stat.maxfloate_logI0Lower 68% confidence interval in logI0log(solLum.pc**-2)stat.errorfloatlogj0Log of central luminosity volume density in the V bandlog(solLum.pc**-3)phys.luminosityfloatE_logj0Upper 68% confidence interval in logj0log(solLum.pc**-3)stat.error;stat.maxfloate_logj0Lower 68% confidence interval in logj0log(solLum.pc**-3)stat.errorfloatlogLLog of total integrated model luminosity in the V bandlog(solLum)phys.luminosityfloatE_logLUpper 68% confidence interval in logLlog(solLum)stat.error;stat.maxfloate_logLLower 68% confidence interval in logLlog(solLum)stat.errorfloatVmagTotal extinction-corrected apparent V band magnitude (3)magphot.mag;em.opt.VfloatE_VmagUpper 68% confidence interval in Vmagmagstat.error;stat.maxfloate_VmagLower 68% confidence interval in Vmagmagstat.error;phot.mag;em.opt.VfloatlogIhLog surface density averaged over half-light radius (4)log(solLum.pc**-2)src.densityfloatE_logIhUpper 68% confidence interval in logIhlog(solLum.pc**-2)stat.error;stat.maxfloate_logIhLower 68% confidence interval in logIhlog(solLum.pc**-2)stat.errorfloatmuhAverage surface brightness within half-light radius in the V bandmag.arcsec**-2phot.mag.sb;em.opt.VfloatE_muhUpper 68% confidence interval in muhmag.arcsec**-2stat.error;stat.maxfloate_muhLower 68% confidence interval in muhmag.arcsec**-2stat.errorfloatM/LAssumed mass-to-light ratio in the V-bandsolMass/solLumphys.composition.massLightRatiofloatE_M/LUpper 68% confidence interval in M/LsolMass/solLumstat.error;stat.maxfloate_M/LLower 68% confidence interval in M/LsolMass/solLumstat.errorfloatlogMtLog of integrated model masslog(solMass)phys.massfloatE_logMtUpper 68% confidence interval in logMtlog(solMass)stat.error;stat.maxfloate_logMtLower 68% confidence interval in logMtlog(solMass)stat.errorfloatlogEbLog of integrated binding energylog(1e-07J)phys.energyfloatE_logEbUpper 68% confidence interval in logEblog(1e-07J)stat.error;stat.maxfloate_logEbLower 68% confidence interval in logEblog(1e-07J)stat.errorfloatlogS0Log of central surface mass densitylog(solMass.pc**-2)phot.flux.density.sbfloatE_logS0Upper 68% confidence interval in logS0log(solMass.pc**-2)stat.error;stat.maxfloate_logS0Lower 68% confidence interval in logS0log(solMass.pc**-2)stat.errorfloatlogrhoLog of central volume densitylog(solMass.pc**-3)meta.bib.volumefloatE_logrhoUpper 68% confidence interval in logrholog(solMass.pc**-3)stat.error;stat.maxfloate_logrhoLower 68% confidence interval in logrholog(solMass.pc**-3)stat.errorfloatlogShLog of surface mass density averaged over half-light radiuslog(solMass.pc**-2)phot.flux.density.sbfloatE_logShUpper 68% confidence interval in logShlog(solMass.pc**-2)stat.error;stat.maxfloate_logShLower 68% confidence interval in logShlog(solMass.pc**-2)stat.errorfloatlogsp0Log of predicted line-of-sight velocity dispersion at cluster centerlog(km.s**-1)phys.veloc.dispersionfloatE_logsp0Upper 68% confidence interval in logsp0log(km.s**-1)stat.error;stat.maxfloate_logsp0Lower 68% confidence interval in logsp0log(km.s**-1)stat.errorfloatlogvLog of predicted central escape velocitylog(km.s**-1)phys.veloc.escapefloatE_logvUpper 68% confidence interval in logvlog(km.s**-1)stat.error;stat.maxfloate_logvLower 68% confidence interval in logvlog(km.s**-1)stat.errorfloatlogtLog of two-body relaxation time (1)log(yr)time.relaxfloatE_logtUpper 68% confidence interval in logtlog(yr)stat.error;stat.maxfloate_logtLower 68% confidence interval in logtlog(yr)stat.errorfloatlogf0Log of model's relaxation time (2)log(solMass.s**3.pc**-3.km**-3)time.relax;meta.modelledfloatE_logf0Upper 68% confidence interval in logf0log(solMass.s**3.pc**-3.km**-3)stat.error;stat.maxfloate_logf0Lower 68% confidence interval in logf0log(solMass.s**3.pc**-3.km**-3)stat.errorfloat