J/A+A/666/A80ivo://CDS.VizieR/J/A+A/666/A80doi:10.26093/cds/vizier.36660080CDSNarloch W.Pietrzynski G.Gieren W.Piatti A.E.Karczmarek P.,Gorski M.Graczyk D.Smolec R.Hajdu G.Suchomska K.Zgirski B.,Wielgorski P.Pilecki B.Taormina M.Kaluszynski M.Pych W.,Rojas Garcia G.Lewis M.O.2022-10-10T13:15:06Z2022-10-07T10:20:26ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryvisible-astronomymedium-band-photometryWe study 147 star clusters in the Large Magellanic Cloud (LMC) in order to determine their mean metallicities and ages, as well as the mean metallicities of 80 surrounding fields. We construct an age-metallicity relation (AMR) for the clusters in the LMC. For this purpose, we use Stroemgren photometry obtained with SOI camera on the 4.1m SOAR telescope. We derive metallicities of individual stars utilizing a calibration of Stroemgren (b-y) and m1 colors with metallicities from the literature. Cluster ages are determined from the isochrone fitting. We find the mean metallicity and age for 110 star clusters and for the remaining 37 we provide an age estimation only. Tothe best of our knowledge, for 29 clusters from our sample we provide both metallicity and age for the first time, while for 66 clusters we provide a first determination of the metallicity, and for 43 clusters the first estimation of the age. We also calculate the mean metallicities for stars from 80 fields around the clusters. The results are then analyzed for spatial metallicity and age distributions of clusters in the LMC, as well as AMR for them. The old, metal-poor star clusters occur both in and out of the LMC bar region, while intermediate-age clusters are located mostly outside of the bar. The majority of star clusters younger than 1Gyr are located in the bar region. We find good agreement between our AMR and theoretical models of the LMC chemical enrichment, as well as with AMRs for clusters from the literature. Next, we take advantage of 26 stellar clusters from our sample which host Cepheid variables and use them as an independent check of the correctness of our age determination procedure. We use period-age relations for Cepheids to calculate the mean age of a given cluster and compare it with the age obtained from isochrone fitting. We find good agreement between these ages especially for models taking into account additional physical processes, e.g., rotation. We also compare the AMR of the LMC and Small Magellanic Cloud derived in a uniform way, and note that they indicate possible former interaction between these two galaxies. The Stroemgren photometry obtained for this study is made publicly available.2022A&A...666A..80Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/666/A80CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/117/238 : LMC extended catalog (Bica+, 1999)J/AcA/49/521 : OGLE LMC star clusters BVI photometry (Pietrzynski+, 1999)J/A+A/602/A89 : Star clusters in the Magellanic Clouds (Perren+, 2017)J/A+A/517/A50 : Ages & luminosities of young SMC/LMC star clustershttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/666/A80https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/666/A80http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/666/A80https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/666/A80https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/666/A80http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/666/A80GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/666/A80/table2 (Stroemgren photometry of stars in the LMC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/666/A80/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/666/A80/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/666/A80/table2?GETtext/xml+votable180.050000true69.46947-70.587620.0055555555555555565/8274 8278 6/32790 33046 33051-33052 33054 33073 33075-33078 33080-33081 33084 33090-33091 33093 33101-33103 33119-33121 33123-33124 33136-33137 33141 33148 33793 33800 33802 33824 37506-37507 37514 37516 37550 38922 389543.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/666/A80?format=asciiOpticaldefaultJ/A+A/666/A80/table2Stroemgren photometry of stars in the LMCVmagV magnitudemagphot.mag;em.opt.VfloatFieldOrdinal number of the field of starsmeta.id;obs.fieldintrecnoRecord 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.mainindexedXposX coordinate on the imagepixpos.cartesian.x;instr.detdoubleYposY coordinate on the imagepixpos.cartesian.y;instr.detdoublee_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)Stroemgren (b-y) colormagphot.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.errorfloatm1Stroemgren m1 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 DAOPHOTstat.fit.paramfloat