J/ApJ/824/42ivo://CDS.VizieR/J/ApJ/824/42doi:10.26093/cds/vizier.18240042CDSCaldwell N.Romanowsky A.J.2018-10-18T15:34:36Z2016-09-26T09:49:21ZCDS support team

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

cds-question@unistra.frglobular-star-clustersradial-velocitymetallicitygalaxiesWe carry out a joint spatial-kinematical-metallicity analysis of globular clusters (GCs) around the Andromeda Galaxy (M31), using a homogeneous, high-quality spectroscopic data set. In particular, we remove the contaminating young clusters that have plagued many previous analyses. We find that the clusters can be divided into three major metallicity groups based on their radial distributions: (1) an inner metal-rich group ([Fe/H]>-0.4); (2) a group with intermediate metallicity (with median [Fe/H]=-1); and (3) a metal-poor group, with [Fe/H]. The metal-rich group has kinematics and spatial properties like those of the disk of M31, while the two more metal-poor groups show mild prograde rotation overall, with larger dispersions --in contrast to previous claims of stronger rotation. The metal-poor GCs are the least concentrated group; such clusters occur five times less frequently in the central bulge than do clusters of higher metallicity. Despite some well-known differences between the M31 and Milky Way GC systems, our revised analysis points to remarkable similarities in their chemodynamical properties, which could help elucidate the different formation stages of galaxies and their GCs. In particular, the M31 results motivate further exploration of a metal-rich GC formation mode in situ, within high-redshift, clumpy galactic disks.2016ApJ...824...42Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/824/42CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/143 : Revised Bologna Catalog of M31 clusters, V.5 (Galleti+ 2012)VII/195 : Globular Clusters in the Milky Way (Harris, 1996)J/AJ/148/4 : JHK photometry of 913 globular clusters in M31 (Wang+, 2014)J/ApJ/769/10 : Spectroscopy of M31 globular clusters (Jacoby+, 2013)J/AJ/146/135 : Physical param. of 29 M31 globular clusters (Agar+, 2013)J/A+A/549/A60 : Ages and [Fe/H] of M31 globular clusters (Cezario+, 2013)J/A+A/544/A155 : HST photometry of M31 globular clusters (Federici+, 2012)J/MNRAS/426/975 : Kinematics of NGC 2768 from PNe (Forbes+, 2012)J/ApJ/758/133 : Metallicity of M31 HII regions & PNe (Sanders+, 2012)J/AJ/143/14 : Lick indices of M31 globular clusters (Schiavon+, 2012)J/A+A/531/A155 : HST photometry in six M31 globular clusters (Perina+, 2011)J/AJ/141/61 : Star clusters in M31. II. (Caldwell+, 2011)J/MNRAS/402/803 : M31 globular cluster system (Peacock+, 2010)J/AJ/139/1438 : SED & age estimates of M31 globular clusters (Wang+, 2010)J/A+A/508/1285 : Metallicity of M31 globular clusters (Galleti+, 2009)J/A+A/507/1375 : HST/ACS VI data of M31 globular clusters (Perina+, 2009)J/AJ/137/94 : Star clusters in M31 (Caldwell+, 2009)J/AJ/133/2764 : M31 globular clusters structural parameters (Barmby+, 2007)J/A+A/471/127 : Revised Bologna Catalog of M31 clusters, V.3 Galleti+, 2007)J/A+A/456/985 : Radial velocities of M31 candidate clusters (Galleti+, 2006)J/AJ/123/2490 : RV & [Fe/H] of M31 globular cluster system (Perrett+, 2002)J/AJ/119/727 : M31 globular clusters photometry (Barmby+, 2000)J/AcA/48/455 : Globular Clusters in M31 and M33 (Mochejska+, 1998)http://www.cfa.harvard.edu/oir/eg/m31clusters/M31_Hectospec.html : M31https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/824/42https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/824/42http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/824/42https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/824/42https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/824/42http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/824/42GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/824/42/table1 (All known globular clusters in our M31 sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/824/42/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/824/42/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/824/42/table1?GETtext/xml+votable180.050000true359.343.55222220.0055555555555555565/655 666 676 677 6/2221 2302 2303 2567 2589 2591 2597 2598 2607 2610 2611 2612 2613 2616 2619 2624 2640 2646 2651 2656 2662 2663 2668 2674 2681 2690 2692 2694 2695 2698 2701 2712 2713 2714 2720 2729 2735 2736 2742 2751 2752 2753 2755 2756 2757 2764 2857 13653 13661https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/824/42?format=asciidefaultJ/ApJ/824/42/table1All known globular clusters in our M31 sampleSimbadNameSimbad column added by the CDSmeta.idcharNEDnameNED column added by the CDSmeta.idcharNameObject identifiermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[0/23] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[31/48] Degree of Declination (J2000)pos.eq.dec;meta.mainRVel[-713/70.5]? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVel[0.2/40]? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatnullabler_RVelReference code for RVel (1)meta.ref;pos.framechar[Fe/H][-2.8/0.4]? Metallicityphys.abund.Zfloatnullablee_[Fe/H][0.1/0.9]? Uncertainty in [Fe/H] (2)stat.error;phys.abund.Fefloatnullabler_[Fe/H]Reference code for [Fe/H] (1)meta.refcharAge[4.8/14] Age from paper II (Caldwell+, 2011, J/AJ/141/61)Gyrtime.agefloatu_Age[:] Uncertainty flag on Agemeta.code.error;time.agecharLogM[2/7.2]? Log total mass (3)log(solMass)phys.massfloatnullableR[0.1/141] Radial distance to M31 centerkpcpos.angDistancefloatRa[0.2/409] Semi-major axis radius (4)kpcphys.size.smajAxisfloatpPDisplay data from papers I, II and IV (Caldwell+, 2009, J/AJ/137/94; 2011, J/AJ/141/61 and Schiavon+, 2012, J/AJ/143/14, respectively)meta.ref.urlintnullable