J/MNRAS/402/803ivo://CDS.VizieR/J/MNRAS/402/803doi:10.26093/cds/vizier.74020803CDSPeacock M.B.MacCarone T.J.Knigge C.Kundu A.Waters C.Z.Zepf S.E.,Zurek D.R.2024-07-10T20:17:23Z2010-09-10T15:24:25ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustersvisible-astronomysloan-photometryWe present an updated catalogue of M31 globular clusters (GCs) based on images from the Wide Field Camera (WFCAM) on the United Kingdom Infrared Telescope and from the Sloan Digital Sky Survey (SDSS). Our catalogue includes new, self-consistent ugriz and K-band photometry of these clusters. We discuss the difficulty of obtaining accurate photometry of clusters projected against M31 due to small-scale background structure in the galaxy. We consider the effect of this on the accuracy of our photometry and provide realistic photometric error estimates. We investigate possible contamination in the current M31 GC catalogues using the excellent spatial resolution of these WFCAM images combined with the SDSS multicolour photometry. We identify a large population of clusters with very blue colours. Most of these have recently been proposed by other works as young clusters. We distinguish between these, and old clusters, in the final classifications. Our final catalogue includes 416 old clusters, 156 young clusters and 373 candidate clusters. We also investigate the structure of M31's old GCs using previously published King model fits to these WFCAM images. We demonstrate that the structure and colours of M31's old GC system are similar to those of the Milky Way. One GC (B383) is found to be significantly brighter in previous observations than observed here. We investigate all of the previous photometry of this GC and suggest that this variability appears to be genuine and short lived. We propose that the large increase in its luminosity may have been due to a classical nova in the GC at the time of the previous observations in 1989.2010MNRAS.402..803Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/402/803CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/416/917 : Revised Bologna Catalog of M31 GCs (Galleti+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/402/803https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/402/803http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/402/803https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/402/803https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/402/803http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/402/803GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/402/803/table1 (Photometry and structural parameters of M31 GCs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/402/803/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/402/803/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/402/803/table1?GETtext/xml+votable180.050000true10.7421241.281320.0055555555555555565/655 666 676-677 6/2567 2589 2591 2597-2598 2607 2610-2613 2615-2616 2619 2624 2656 2662 2668 2674 2681 2692 2695 2701 2712-2713 2752 2755-27577.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/402/803?format=asciiOpticaldefaultJ/MNRAS/402/803/table1Photometry and structural parameters of M31 GCsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName taken from the RBC, Galleti et al., 2004, Cat. J/A+A/416/917 (1)meta.id;meta.maincharONameOther names from RBV (J/A+A/416/917)meta.idcharRAJ2000Right ascension in decimal degrees (J2000) (2)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (2)degpos.eq.dec;meta.mainfClassification of the globular cluster (3)meta.code.classintn_fAdditional classification for galaxiesmeta.notecharf1? Classification from the RBC V3.5 (3)meta.code.classintnullablef2Classification from Calwell et al., 2009AJ....137...94Cmeta.code.classcharRg? Aperture size used to obtain total g magnitudearcsecphys.angSize;srcfloatnullablegmag? g magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag? rms uncertainty on g total magnitude, includes the statistical, calibration and systematic errorsmagstat.error;phot.mag;em.opt.Bfloatnullableu-g? u-g colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_u-g? rms uncertainty on u-gmagstat.errorfloatnullableg-r? g-r colour indexmagphot.color;em.opt.B;em.opt.Rfloatnullablee_g-r? rms uncertainty on g-rmagstat.error;phot.color;em.opt.Bfloatnullabler-i? r-i colour indexmagphot.color;em.opt.R;em.opt.Ifloatnullablee_r-i? rms uncertainty on r-imagstat.error;phot.color;em.opt.Rfloatnullablei-z? i-z colour indexmagphot.color;em.opt.I;em.opt.Ifloatnullablee_i-z? rms uncertainty on i-zmagstat.errorfloatnullableRKs? Aperture size used to obtain total Ks magnitudearcsecphys.angSize;srcfloatnullableKsmag? Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullablec? Concentration parameter (C=log(rt/r_0_), r_0_ = core radius)stat.paramfloatnullablerh? Half-light radius (4)pcphys.size.radiusfloatnullablert? Tidal radius (4)pcphys.size.radiusfloatnullablelog(rho0)? Cluster core density (in L_K_({sun})/pc^3^ units)log(solLum.pc**-3)phys.luminosityfloatnullableSimbadNameSimbad column added by the CDSmeta.idchar