J/A+A/532/A147ivo://CDS.VizieR/J/A+A/532/A147doi:10.26093/cds/vizier.35320147CDSLarsen S.S.de Mink S.E.Eldridge J.J.Langer N.Bastian N.,Seth A.Smith L.J.Brodie J.Efremov Y.N.2017-06-13T11:09:18Z2011-09-25T15:49:09ZCDS support team

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

cds-question@unistra.frgalaxiesstellar-associationshst-photometryWe present colour-magnitude diagrams (CMDs) for a sample of seven young massive clusters in the galaxies NGC 1313, NGC 1569, NGC 1705 and NGC 5236. The clusters have ages in the range 5-50 million years and masses of 10^5^-10^6^M_{sun}_. Although crowding prevents us from obtaining photometry in the inner regions of the clusters, we are still able to measure up to 30-100 supergiant stars in each of the richest clusters, along with the brighter main sequence stars. The resulting CMDs and luminosity functions are compared with photometry of artificially generated clusters, designed to reproduce the photometric errors and completeness as realistically as possible. In agreement with previous studies, our CMDs show no clear gap between the H-burning main sequence and the He-burning supergiant stars, contrary to predictions by common stellar isochrones. In general, the isochrones also fail to match the observed number ratios of red-to-blue supergiant stars, although the difficulty of separating blue supergiants from the main sequence complicates this comparison. In several cases we observe a large spread (1-2mag) in the luminosities of the supergiant stars that cannot be accounted for by observational errors. This spread can be reproduced by including an age spread of 10-30 million years in the models. However, age spreads cannot fully account for the observed morphology of the CMDs and other processes, such as the evolution of interacting binary stars, may also play a role.2011A&A...532A.147Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/532/A147CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/139/393 : Young Massive Star Clusters. II. (Larsen, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/532/A147https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/532/A147http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/532/A147https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/532/A147https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/532/A147http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/532/A147GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/532/A147/table1 (Data for the clusters analysed in this paper)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/532/A147/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/532/A147/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/532/A147/table1?GETtext/xml+votable180.050000true67.700333364.84922220.005555555555555556Cone search capability for table J/A+A/532/A147/phot (Photometry of stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/532/A147/phot?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/532/A147/phot?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/532/A147/phot?GETtext/xml+votable180.050000true67.6999994464.848698610.0055555555555555566/3389 16441 33193 33986 43881https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/532/A147?format=asciiOpticaldefaultJ/A+A/532/A147/table1Data for the clusters analysed in this paperrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainDistCluster distanceMpcpos.distance;pos.galactocentricfloatr_DistDistance reference (1)meta.ref;pos.framecharVmagV magnitude of clustermagphot.mag;em.opt.VfloatABAbsorption in B bandmagphot.mag;em.opt.BfloatlogAgeAge of clusterlog(yr)time.agefloatMassEstimated mass of clustersolMassphys.massdoublel_MTO[~] Limit flag on MTOmeta.code.errorcharMTOMain sequence turn-off masssolMassphys.massfloatFWHM1FWHM size of cluster in arcsecarcsecphys.angSizefloatFWHM2FWHM size of cluster in parsecspcphys.size.radiusfloatetaBest fitting parameter {eta} (2)stat.fit.paramfloatTb[2/10] Number of the table containing the individual photometrymeta.id;meta.datasetintprimarySimbadNameSimbad column added by the CDSmeta.idcharJ/A+A/532/A147/photPhotometry of starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTbSimbad column added by the CDSmeta.id;meta.datasetintnullableSeqAllframe sequential number within the clustermeta.recordintXposX coordinate on CCD imagepixpos.cartesian.x;instr.detfloatYposY coordinate on CCD imagepixpos.cartesian.y;instr.detfloatoRAOffset in right ascension relative to cluster centrearcsecpos.eq.ra;arith.difffloatoDEOffset in Declination relative to cluster centrearcsecpos.eq.dec;arith.difffloatF435W? F435W absolute magnitude (1)magphys.magAbsfloatnullablee_F435W? Error on F435W magnitude (1)magstat.errorfloatnullableF555WF555W absolute magnitudemagphys.magAbsfloate_F555WError on F555W magnitudemagstat.errorfloatF814WF814W absolute magnitudemagphys.magAbsfloate_F814WError on F814W magnitudemagstat.errorfloat_c+Position calculated from center and offsetschar_RAPosition calculated from center and offsets (right ascension part)degpos.eq.ra;meta.main_DEPosition calculated from center and offsets (declination part)degpos.eq.dec;meta.main