J/AJ/152/45ivo://CDS.VizieR/J/AJ/152/45doi:10.26093/cds/vizier.51520045CDSChen B.Liu X.Xiang M.Yuan H.Huang Y.Shi J.Fan Z.Huo Z.,Wang C.Ren J.Tian Z.Zhang H.Liu G.Cao Z.Zhang Y.Hou Y.,Wang Y.2018-08-24T11:22:24Z2016-09-20T15:14:52ZCDS support team

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

cds-question@unistra.frgalaxiesstellar-associationsglobular-star-clustersinfrared-photometryvisible-astronomyWide-band photometryinterstellar-reddeningmetallicityWe select from Paper I a sample of 306 massive star clusters observed with the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) in the vicinity fields of M31 and M33, and determine their metallicities, ages, and masses. Metallicities and ages are estimated by fitting the observed integrated spectra with stellar synthesis population (SSP) models with a pixel-to-pixel spectral fitting technique. Ages for most young clusters are also derived by fitting the multi-band photometric measurements with model spectral energy distributions (SEDs). The estimated cluster ages span a wide range, from several million years to the age of the universe. The numbers of clusters younger and older than 1Gyr are, respectively, 46 and 260. With ages and metallicities determined, cluster masses are then estimated by comparing the multi-band photometric measurements with SSP model SEDs. The derived masses range from ~10^3^ to ~10^7^M_{Sun}_, peaking at ~10^4.3^ and ~10^5.7^M_{Sun}_ for young (<1Gyr) and old (>1Gyr) clusters, respectively. Our estimated metallicities, ages, and masses are in good agreement with available literature values. Old clusters richer than [Fe/H]~-0.7dex have a wide range of ages. Those poorer than [Fe/H]~-0.7dex seem to be composed of two groups, as previously found for Galactic globular clusters-one of the oldest ages with all values of metallicity down to ~-2dex and another with metallicity increasing with decreasing age. The old clusters in the inner disk of M31 (0-30kpc) show a clear metallicity gradient measured at -0.038+/-0.023dex/kpc.2016AJ....152...45Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/152/45CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/143 : Revised Bologna Catalog of M31 clusters, V.5 (Galleti+ 2012)III/251 : ELODIE library V3.1 (Prugniel+ 2007)J/other/RAA/15.1392 : LAMOST globular clusters in M 31 and M 33 (Chen+, 2015)J/ApJS/199/37 : GALEX catalog of star clusters in M31 (Kang+, 2012)J/ApJ/752/95 : PHAT stellar cluster survey. I. Year 1 (Johnson+, 2012)J/AJ/139/1438 : SED and age estimates of 104 M31 GCs (Wang+, 2010)J/ApJ/725/200 : Updated cat. of M31 globular-like clusters (Fan+, 2010)J/MNRAS/404/1639 : MILES models & new line index system (Vazdekis+, 2010)J/MNRAS/402/803 : M31 globular cluster system (Peacock+, 2010)J/A+A/508/1285 : Metallicities of M31 globular clusters (Galleti+, 2009)J/MNRAS/374/664 : Stellar parameters in MILES library (Cenarro+, 2007)J/MNRAS/371/703 : MILES library of spectra (Sanchez-Blazquez+, 2006)J/AJ/123/2490 : RV and [Fe/H] of M31 globular clusters (Perrett+, 2002)J/AJ/119/727 : M31 globular clusters photometry (Barmby+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/152/45https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/152/45http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/152/45https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/152/45https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/152/45http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/152/45GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/152/45/clusters (Optical photometry and reddening (table1), and derived properties (table3) of massive star clusters observed with LAMOST)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/45/clusters?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/45/clusters?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/45/clusters?GETtext/xml+votable180.050000true9.9625340.969630.0055555555555555565/655 666 676 6/2155 2567 2586 2589 2610 2611 2613 2618 2619 2624 2656 2663 2668 2708 2709 2710 2752 2753https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/152/45?format=asciiInfraredOpticaldefaultJ/AJ/152/45/clustersOptical photometry and reddening (table1), and derived properties (table3) of massive star clusters observed with LAMOSTSimbadNameSimbad column added by the CDSmeta.idcharNameSource identifiermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPapINumber of sources in Paper I (Chen et al. 2015, Cat. J/other/RAA/15.1392) within 1.5''meta.ref.urlintnullableRBCNumber of sources in the Revised Bologna Catalog (RBC; Galleti et al. 2012, Cat. V/143) within 1.5''meta.ref.urlintnullableC09Number of data in Caldwell et al. 2009 (Cat. J/AJ/137/94) and Caldwell et al. 2011 (Cat. J/AJ/141/61) within 1.5''meta.ref.urlintnullableP10Number of sources in Peacock et al. 2010 (Cat. J/MNRAS/402/803) within 1.5''meta.ref.urlintnullableK12Number of sources in Kang et al. 2012 (Cat. J/ApJS/199/37) within 1.5''meta.ref.urlintnullableSDSSDisplay the photometric data from SDSS-DR9 (Cat. V/139)meta.ref.urlcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainRV[-725/141] Radial velocitykm/sphys.veloc;pos.heliocentricinte_RV[1/150]? Uncertainty in RVkm/sstat.errorintnullableumag[15.48/21]? u band magnitude (1)magphot.mag;em.opt.Ufloatnullablee_umag[0.02/0.31]? Uncertainty in umagmagstat.error;phot.mag;em.opt.Ufloatnullablegmag[14.5/19.45]? g band magnitude (1)magphot.mag;em.opt.Bfloatnullablee_gmag[0/0.2]? Uncertainty in gmagmagstat.error;phot.mag;em.opt.Bfloatnullablermag[13.56/18.55]? r band magnitude (1)magphot.mag;em.opt.Rfloatnullablee_rmag[0/0.11]? Uncertainty in rmagmagstat.error;phot.mag;em.opt.Rfloatnullableimag[13.14/18.52]? i band magnitude (1)magphot.mag;em.opt.Ifloatnullablee_imag[0/0.11]? Uncertainty in imagmagstat.error;phot.mag;em.opt.Ifloatnullablezmag[12.89/18.71]? z band magnitude (1)magphot.mag;em.opt.Ifloatnullablee_zmag[0.01/0.21]? Uncertainty in zmagmagstat.error;phot.mag;em.opt.IfloatnullableE(B-V)[0.01/1.3] The (B-V) color excess (2)magphot.color.excessfloat[Fe/H]P[-2.3/0.7]? Metallicity from full spectral fitting PEGASE-HR model (3)log(Sun)phys.abund.Fefloatnullablef_[Fe/H]P[:] Flag ":" on [Fe/H]P indicates that the cluster suffers from the degeneracymeta.codechare_[Fe/H]P[0.01/0.57]? Uncertainty in [Fe/H]Plog(Sun)stat.error;phys.abund.Fefloatnullable[Fe/H]V[-2.32/0.22]? Metallicity from full spectral fitting with the model of Vazdekis et al. 2010 (Cat. J/MNRAS/404/1639) model (4)log(Sun)phys.abund.Fefloatnullablee_[Fe/H]V[0.01/0.87]? Uncertainty in [Fe/H]Vlog(Sun)stat.error;phys.abund.Fefloatnullable[Fe/H]G[-8.21/0.19]? Metallicity from the [MgFe] index using the relation of Galleti et al. 2009 (Cat. J/A+A/508/1285) (5)log(Sun)phys.abund.Fefloatnullable[Fe/H]C[-2.47/0.07]? Metallicity from the <Fe> index using the relation of Caldwell et al. 2011 (Cat. J/AJ/141/61) (5)log(Sun)phys.abund.Fefloatnullable[Fe/H]E[-1.28/0.08]? Metallicity from the EZ_Ages package (6)log(Sun)phys.abund.FefloatnullablelogAP[9/10.3]? Log age from full spectral fitting with the PEGASE-HR model (3)log(yr)time.agefloatnullablee_logAP[0.01/0.65]? Uncertainty in logAPlog(yr)stat.errorfloatnullablelogAV[9/10.25]? Log age from full spectral fitting with Vazdekis et al. 2010 (Cat. J/MNRAS/404/1639) model (4)log(yr)time.agefloatnullablee_logAV[0.01/0.9]? Uncertainty in logAVlog(yr)stat.errorfloatnullablelogAS[6.4/9]? Log age from SED fitting (7)log(yr)time.agefloatnullablee_logAS[0.14/0.69]? Uncertainty in logASlog(yr)stat.errorfloatnullablelogAE[9/10.2]? Log age from EZ_Ages package (6)log(yr)time.agefloatnullablef_logM[1/2] Flag for note on logM (1 or 2) (8)meta.codeintlogM[2.61/7.8]? Log estimated mass (9)log(solMass)phys.massfloatnullablee_logM[0/0.51]? Uncertainty in logMlog(solMass)stat.errorfloatnullable