J/ApJ/559/851ivo://CDS.VizieR/J/ApJ/559/851doi:10.26093/cds/vizier.15590851CDSWilliams B.F.Hodge P.W.2004-11-27T21:26:56Z2004-11-27T22:26:33ZCDS support team

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

cds-question@unistra.frstellar-associationsinterstellar-reddeningWe present a method for finding clusters of young stars in M31 using broadband WFPC2 data from the HST data archive. Applying our identification method to 13 WFPC2 fields, covering an area of 60arcmin^2^, has revealed 79 new candidate young star clusters in these portions of the M31 disk. Most of these clusters are small (<~5pc), young (~10-200Myr) star groups located within large OB associations. We have estimated the reddening values and the ages of each candidate individually by fitting isochrones to the stellar photometry. We provide a catalog of the candidates including rough approximations of their reddenings and ages. We also look for patterns of cluster formation with galactocentric distance, but our rough estimates are not precise enough to reveal any clear patterns.2001ApJ...559..851Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/559/851CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/98/595 : OB associations in M31 (Hill+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/559/851https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/559/851http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/559/851https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/559/851https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/559/851http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/559/851GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/559/851/table1 (Data obtained from the HST data archive used for the Cluster Survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/559/851/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/559/851/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/559/851/table1?GETtext/xml+votable180.050000true9.947291740.532750.005555555555555556Cone search capability for table J/ApJ/559/851/table4 (Catalog of positions, galactocentric distances, age estimates, reddening values, and search radii for M31 young star cluster candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/559/851/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/559/851/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/559/851/table4?GETtext/xml+votable180.050000true9.968458340.52813060.0055555555555555566/2622 2623 2708 2709 2752https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/559/851?format=asciiOpticaldefaultJ/ApJ/559/851/table1Data obtained from the HST data archive used for the Cluster SurveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField numberobs.fieldintNPropProposal numbermeta.id;obsintObsDateObservation Datetime.epochnullableRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainFilterFiltermeta.code;instr.filtercharTexpExposition timestime.duration;obs.exposureintJ/ApJ/559/851/table4Catalog of positions, galactocentric distances, age estimates, reddening values, and search radii for M31 young star cluster candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31SCCIdentification name, JHHMMSS+DDMMSSAmeta.id;meta.maincharNameOther names (1)meta.idcharRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainDistGalactocentric distancekpcpos.galactocentricfloatlogAgeLog of the cluster agelog(yr)time.agefloate_logAgeUncertainty in logAgelog(yr)stat.errorfloatE(B-V)The E(B-V) reddening valuemagphot.color.excessfloate_E(B-V)Uncertainty in E(B-V)magstat.errorfloatRadAutomated search routine radius (2)pcphys.size.radiusint