J/A+A/647/A135ivo://CDS.VizieR/J/A+A/647/A135doi:10.26093/cds/vizier.36470135CDSNarloch W.Pietrzynski G.Gieren W.Piatti A.E.Gorski M.,Karczmarek P.Graczyk D.Suchomska K.Zgirski B.Wielgorski P.,Pilecki B.Taormina M.Kaluszynski M.Pych W.Hajdu G.Rojas Garcia G.2021-09-10T15:03:26Z2021-03-22T08:01:42ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryvisible-astronomymedium-band-photometryIn this work we study 35 stellar clusters in the Small Magellanic Cloud (SMC) in order to provide their mean metallicities and ages. We also provide mean metallicities of the fields surrounding the clusters. We used Stroemgren photometry obtained with the 4.1 m SOAR telescope and take advantage of (b-y) and m1 colors for which there is a metallicity calibration presented in the literature. The spatial metallicity and age distributions of clusters across the SMC are investigated using the results obtained by Stroemgren photometry. We confirm earlier observations that younger, more metal-rich star clusters are concentrated in the central regions of the galaxy, while older, more metal-poor clusters are located farther from the SMC center. We construct the age-metallicity relation for the studied clusters and find good agreement with theoretical models of chemical enrichment, and with other literature age and metallicity values for those clusters. We also provide the mean metallicities for old and young populations of the field stars surrounding the clusters, and find the latter to be in good agreement with recent studies of the SMC Cepheid population. Finally, the Stroemgren photometry obtained for this study is made publicly available.2021A&A...647A.135Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/647/A135CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/159/82 : Updated cat. of extended objects in Magellanic cloudsJ/A+A/602/A89 : Star clusters in the Magellanic Clouds (Perren+, 2017)J/A+A/452/179 : Ages of SMC young clusters and field stars (Chiosi+, 2006)J/A+A/517/A50 : Ages & luminosities of young SMC/LMC star clustersJ/A+A/616/A187 : SMC clusters age-dating & classification (Nayak+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/647/A135https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/647/A135http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/647/A135https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/647/A135https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/647/A135http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/647/A135GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/647/A135/table1 (Star clusters in the SMC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A135/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A135/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A135/table1?GETtext/xml+votable180.050000true27.37625-73.7277780.005555555555555556Cone search capability for table J/A+A/647/A135/table6 (Photometric catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A135/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A135/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A135/table6?GETtext/xml+votable180.050000true27.53167611-73.741133060.0055555555555555566/32958 33287 33294-33295 33304 33306 33313 33316-33317 33320 333283.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/647/A135?format=asciiOpticaldefaultJ/A+A/647/A135/table1Star clusters in the SMCSeeingyAverage seeing in y bandarcsecinstr.obsty.seeingfloatSeeingbAverage seeing in b bandarcsecinstr.obsty.seeingfloatSeeingvAverage seeing in v bandarcsecinstr.obsty.seeingfloatONameOther name(s) of the clusters in usemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterName of the clustermeta.id;meta.maincharRAJ2000Cluster right ascension (J2000) from Bica et al. (2020, Cat. J/AJ/159/82)pos.eq.ra;meta.mainDEJ2000Declination (J2000) for epoch J2000 from Bica et al. (2020, Cat. J/AJ/159/82)pos.eq.dec;meta.mainDateDate of observationtime.epochnullableTexpyExposure time of filter ystime.duration;obs.exposureintTexpbExposure time of filter bstime.duration;obs.exposureintTexpvExposure time of filter vstime.duration;obs.exposureintAirmassyAirmass of observations in y bandobs.airMassfloatAirmassbAirmass of observations in b bandobs.airMassfloatAirmassvAirmass of observations in v bandobs.airMassfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/647/A135/table6Photometric catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000)degpos.eq.dec;meta.mainindexedXx coordinate on the imagepixpos.cartesian.x;instr.detdoubleYy coordinate on the imagepixpos.cartesian.y;instr.detdoubleFieldField containing a given cluster of starsmeta.id;obs.fieldcharVmagV magnitudemagphot.mag;em.opt.Vfloate_VmagDAOPhotometric error of V magnitude resulting from DAOPHOTmagstat.errorfloate_VmagPhotometric error of V magnitude resulting from full propagation of the transformation equation to the standard systemmagstat.error;phot.magfloat(b-y)(b-y) color indexmagphot.color;em.opt.B;em.opt.Vfloate_(b-y)DAOPhotometric error of (b-y) color resulting from DAOPHOTmagstat.errorfloate_(b-y)Photometric error of (b-y) color resulting from full propagation of the transformation equation to the standard systemmagstat.errorfloatm1m1 color indexmagphot.colorfloate_m1DAOPhotometric error of m1 index resulting from DAOPHOTmagstat.errorfloate_m1Photometric error of m1 index resulting from full propagation of the transformation equation to the standard systemmagstat.errorfloatCHICHI parameter from DAOPHOTstat.fit.paramfloatSHARPSHARP parameter from DAOPHOTsrc.morph.paramfloat