J/A+A/616/A187ivo://CDS.VizieR/J/A+A/616/A187doi:10.26093/cds/vizier.36160187CDSNayak P.K.Subramaniam A.Choudhury S.Sagar R.2018-09-28T08:52:33Z2018-09-12T10:38:16ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsstellar-associationsWe aim to estimate the age and reddening parameters of already identified star clusters within the Small Magellanic Cloud (SMC) in a consistent way using available photometric data, classify them based on their mass and strength, and study their spatio-temporal distribution. We have used a semi-automated quantitative method, developed in the first paper of this series (Paper I), to estimate the cluster parameters using the V and I band photometric data from the Optical Gravitational Lensing Experiment (OGLE) III survey. We estimated parameters of 179 star clusters (17 are newly parameterised) and classified them into four groups. We present an online catalogue of parameters as well as cleaned and isochrone-fitted colour magnitude diagrams of 179 clusters. We compiled age information of 468 clusters by combining previous studies with our catalogue, to study their spatio-temporal distribution. Most of the clusters located in the southern part of the SMC are in the age range 600Myr-1.25Gyr, whereas, the clusters younger than 100Myr are mostly found in the northern SMC, with the central SMC showing continuous cluster formation. The peak of the cluster age distribution is identified at 130+/-35Myr, very similar to the Large Magellanic Cloud (LMC) in Paper I. We suggest that the burst of cluster formation at 130Myr is due to the most recent LMC-SMC interaction. 90% of the studied sample is found to have mass <1700M_{sun}_, suggesting that the SMC is dominated by low mass clusters. There is tentative evidence for compact clusters in the LMC when compared to those in the Galaxy and the SMC. A progressive shifting of cluster location from the south to north of the SMC is identified in last ~600Myr. The details of spatio-temporal distribution of clusters presented in two videos as part of this study can be used as a tool to constrain details of the recent LMC-SMC interactions.2018A&A...616A.187Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/616/A187CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/389/678 : Catalogue of extended objects in Magellanic CloudsJ/A+A/517/50 : Ages + luminosities of young SMC/LMC star clustersJ/A+A/452/179 : Ages of SMC young clusters and field stars (Chiosi+, 2006)J/MNRAS/463/1446 : Star clusters in Magellanic Clouds (Nayak+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/616/A187https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/616/A187http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/616/A187https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/616/A187https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/616/A187http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/616/A187GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/616/A187/table2 (Parameters and classification for 179 star clusters in the SMC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/616/A187/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/616/A187/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/616/A187/table2?GETtext/xml+votable180.050000true6.9875-74.400560.0055555555555555565/8326 6/33291 33293-33295 33298-33299 33313 33316-33318 33328-33329https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/616/A187?format=asciidefaultJ/A+A/616/A187/table2Parameters and classification for 179 star clusters in the SMCSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster namemeta.id;meta.maincharn_Name[*] Note on Name (1)meta.notecharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainRRadiusarcminphys.angSizefloatE(V-I)Foreground reddeningmagphot.color.excessfloatlogAgecluster age in logarithmic scalelog(yr)instr.scalefloatl_logAgeG10Limit flag on logAgeG10meta.code.errorcharlogAgeG10? Earlier estimation of age by Glatt et al. 2010, Cat. J/A+A/517/50 (2)log(yr)time.agefloatnullablel_logAgePU99Limit flag on loglogAgeG10meta.code.errorcharlogAgePU99? Earlier estimation of age by Pietrzynski & Udalski 1999AcA....49..157Plog(yr)time.agefloatnullablelogAgeC06? Earlier estimation of age by Chiosi et al., 2006, Cat. J/A+A/452/179log(yr)time.agefloatnullableGroupGroup number of cluster based on its strength and mass range. (see Table 1 in the paper)meta.idchar