J/AJ/122/2458ivo://CDS.VizieR/J/AJ/122/2458doi:10.26093/cds/vizier.51222458CDSBarmby P.Huchra J.P.2023-04-06T16:50:45Z2002-05-07T09:23:51ZCDS support team

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

cds-question@unistra.frglobular-star-clustersGlobular clusters at the distance of M31 have apparent angular sizes of a few arcseconds. While many M31 globular clusters have been detected and studied from ground-based images, the high spatial resolution of the Hubble Space Telescope (HST) allows much more robust detection and characterization of star cluster properties. We present the results of a search of 157 HST Wide Field Planetary Camera 2 images of M31. We found 82 previously catalogued globular cluster candidates, as well as 32 new globular cluster candidates and 20 open cluster candidates. We present images of the new candidates and photometry for all clusters. We assess existing cluster catalogs' completeness and use the results to estimate the total number of globular clusters in M31 as 460+/-70. The specific frequency is S_N_=1.2+/-0.2 and the mass specific frequency T=2.4+/-0.4; these values are at the upper end of the range seen for spiral galaxies.2001AJ....122.2458Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/122/2458CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/116/447 : M31 globulars clusters ellipticities (Staneva+, 1996)J/AJ/114/1488 : Globulars in M31 (Holland+ 1997)J/AcA/48/455 : Globular Clusters in M31 and M33 (Mochejska+, 1998)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/122/2458https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/122/2458http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/122/2458https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/122/2458https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/122/2458http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/122/2458GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/122/2458/table1 (HST fields Used in the search)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2458/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2458/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2458/table1?GETtext/xml+votable180.050000true8.15087539.46205560.005555555555555556Cone search capability for table J/AJ/122/2458/table3 (New globular cluster candidates found in M31 HST fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2458/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2458/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2458/table3?GETtext/xml+votable180.050000true8.547833339.399750.0055555555555555566/2619 2621-2623 2664 2666 2704-2705 2708-2709 2752https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/122/2458?format=asciiOpticaldefaultJ/AJ/122/2458/table1HST fields Used in the searchrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFiltFilter used in observationmeta.code;instr.filtercharExpCombined exposure of all imagesstime.duration;obs.exposureintNameDataset namemeta.id;meta.filecharJ/AJ/122/2458/table2Catalogued objects that are not M31 globular clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCatalog object name, as in Barmby et al., 2000, Cat. <J/AJ/119/727>meta.id;meta.maincharClassObject classification (1)src.classcharHSTThe HST field(s) image name(s)meta.id;obscharJ/AJ/122/2458/table3New globular cluster candidates found in M31 HST fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster designation, M31GC JHHMMSS+DDMMSS or M31OC JHHMMSS+DDMMSSmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainQual[ABCD/ ] Globular cluster probability code (1)meta.code.qualcharComComments and possible identificationmeta.notecharJ/AJ/122/2458/table4Photometry of new clusters and candidates in M31recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster name (1)meta.id;meta.mainUmag? The integrated U band magnitudemagphot.mag;em.opt.Ufloatnullablef_Umag[*] Indicates a F300W instead of standard U-band magnitudemeta.code.errorcharBmag? The integrated B band magnitudemagphot.mag;em.opt.BfloatnullableVmag? The integrated V band magnitudemagphot.mag;em.opt.VfloatnullableRmag? The integrated R band magnitudemagphot.mag;em.opt.RfloatnullableImag? The integrated I band magnitudemagphot.mag;em.opt.IfloatnullableRad1/2The half-light radiusarcsecphys.angSize;srcfloat