BV photometry of 6 SMC stellar clustersJ/A+A/561/A106ivo://CDS.VizieR/J/A+A/561/A106doi:10.26093/cds/vizier.35610106CDSDias B.Kerber L.Barbuy B.Santiago B.Ortolani S.Balbinot E.2017-10-13T15:42:01Z2014-01-17T08:34:22ZCDS support team
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
cds-question@unistra.frmagellanic-cloudsstellar-associationsccd-photometryvisible-astronomybroad-band-photometryhertzsprung-russell-diagramStellar clusters in the Small Magellanic Cloud (SMC) are useful probes to study the chemical and dynamical evolution of this neighbouring dwarf galaxy, enabling inspection of a large period covering over 10Gyr. The main goals of this work are the derivation of age, metallicity, distance modulus, reddening, core radius and central density profile for six sample clusters, in order to place them in the context of the Small Cloud evolution. The studied clusters are: AM 3, HW 1, HW 34, HW 40, Lindsay 2, and Lindsay 3, where HW 1, HW 34, and Lindsay 2 are studied for the first time. Optical Colour-Magnitude Diagrams (V, B-V CMDs) and radial density profiles were built from images obtained with the 4.1m SOAR telescope, reaching V~23. The determination of structural parameters were carried out applying King profile fitting. The other parameters were derived in a self-consistent way by means of isochrone fitting, which uses the likelihood statistics to identify the synthetic CMDs that best reproduce the observed ones. Membership probabilities were determined comparing the cluster and control field CMDs. Completeness and photometric uncertainties were obtained performing artificial star tests. The results confirm that these clusters (except HW 34, identified as a field fluctuation) are intermediate-age clusters, with ages between 1.2Gyr (Lindsay 3) and ~5.0Gyr (HW 1). In particular HW 1, Lindsay 2, and Lindsay 3 are located in a region that we called West Halo, where studies on ages and metallicity gradients are still lacking. Moreover Lindsay 2 was identified as a moderately metal-poor cluster with [Fe/H]=-1.4+/-0.2dex, lower than expected from the age-metallicity relation by Pagel & Tautvaisiene (1998MNRAS.299..535P). We also found distances varying from ~53 to 66kpc, compatible with the large depth of the SMC.2014A&A...561A.106Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/561/A106CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/377/300 : CT1 photometry in 6 SMC star clusters (Piatti+, 2007)J/MNRAS/381/L84 : CT1 photometry of 3 SMC old clusters (Piatti+, 2007)J/MNRAS/382/1203 : CT1 photometry of 5 SMC star clusters (Piatti+, 2007)J/MNRAS/389/429 : CT1 photometry of 7 young SMC star clusters (Piatti+, 2008)J/MNRAS/417/1559 : CT1T2 photometry in 14 SMC star clusters (Piatti+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/561/A106https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/561/A106http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/561/A106https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/561/A106https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/561/A106http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/561/A106GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/561/A106/table1 (Log of observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A106/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A106/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A106/table1?GETtext/xml+votable180.050000true357.24583-72.9450.005555555555555556Cone search capability for table J/A+A/561/A106/am3 (Star coordinates, magnitudes, completeness and membership probability for AM3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A106/am3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A106/am3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A106/am3?GETtext/xml+votable180.050000true357.219375-72.93671110.005555555555555556Cone search capability for table J/A+A/561/A106/hw1 (Star coordinates, magnitudes, completeness and membership probability for HW1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A106/hw1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A106/hw1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A106/hw1?GETtext/xml+votable180.050000true4.626375-73.38875280.005555555555555556Cone search capability for table J/A+A/561/A106/hw34 (Star coordinates, magnitudes, completeness and membership probability for HW34)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A106/hw34?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A106/hw34?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A106/hw34?GETtext/xml+votable180.050000true14.4382917-73.54756110.005555555555555556Cone search capability for table J/A+A/561/A106/hw40 (Star coordinates, magnitudes, completeness and membership probability for HW40)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A106/hw40?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A106/hw40?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A106/hw40?GETtext/xml+votable180.050000true15.1157083-71.28488610.005555555555555556Cone search capability for table J/A+A/561/A106/l2 (Star coordinates, magnitudes, completeness and membership probability for Lindsay2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A106/l2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A106/l2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A106/l2?GETtext/xml+votable180.050000true3.2654583-73.48204170.005555555555555556Cone search capability for table J/A+A/561/A106/l3 (Star coordinates, magnitudes, completeness and membership probability for Lindsay3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A106/l3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A106/l3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A106/l3?GETtext/xml+votable180.050000true4.5905-74.32642220.0055555555555555566/33293 33313-33315 33330 45332https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/561/A106?format=asciiOpticaldefaultJ/A+A/561/A106/table1Log of observationsBairMAirmass in B bandobs.airMassfloatBexpExposure time in B bandstime.duration;obs.exposure;em.opt.BintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation datetime.epoch;obsnullableClusterCluster namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBseeSeeing in B bandarcsecinstr.obsty.seeingfloatVexpExposure time in V bandstime.duration;obs.exposure;em.opt.VintVairMAirmass in V bandobs.airMassfloatVseeSeeing in V bandarcsecinstr.obsty.seeingfloatFileNameName of the file with photometrymeta.id;phot;meta.filecharSimbadSimbad column added by the CDSmeta.ref.urlchar
J/A+A/561/A106/am3Star coordinates, magnitudes, completeness and membership probability for AM3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainBmagB-Bessel magnitudemagphot.mag;em.opt.Bfloate_BmagError in B-Bessel magnitudemagstat.error;phot.mag;em.opt.BfloatVmagV-Bessel magnitudemagphot.mag;em.opt.Vfloate_VmagError in V-Bessel magnitudemagstat.error;phot.mag;em.opt.VfloatCmplCompleteness (1)meta.notefloatPmem[0/1]? Cluster membership probability (2)stat.probabilityfloatnullable
J/A+A/561/A106/hw1Star coordinates, magnitudes, completeness and membership probability for HW1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainBmagB-Bessel magnitudemagphot.mag;em.opt.Bfloate_BmagError in B-Bessel magnitudemagstat.error;phot.mag;em.opt.BfloatVmagV-Bessel magnitudemagphot.mag;em.opt.Vfloate_VmagError in V-Bessel magnitudemagstat.error;phot.mag;em.opt.VfloatCmplCompleteness (1)meta.notefloatPmem[0/1]? Cluster membership probability (2)stat.probabilityfloatnullable
J/A+A/561/A106/hw34Star coordinates, magnitudes, completeness and membership probability for HW34recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainBmagB-Bessel magnitudemagphot.mag;em.opt.Bfloate_BmagError in B-Bessel magnitudemagstat.error;phot.mag;em.opt.BfloatVmagV-Bessel magnitudemagphot.mag;em.opt.Vfloate_VmagError in V-Bessel magnitudemagstat.error;phot.mag;em.opt.VfloatCmplCompleteness (1)meta.notefloatPmem[0/1]? Cluster membership probability (2)stat.probabilityfloatnullable
J/A+A/561/A106/hw40Star coordinates, magnitudes, completeness and membership probability for HW40recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainBmagB-Bessel magnitudemagphot.mag;em.opt.Bfloate_BmagError in B-Bessel magnitudemagstat.error;phot.mag;em.opt.BfloatVmagV-Bessel magnitudemagphot.mag;em.opt.Vfloate_VmagError in V-Bessel magnitudemagstat.error;phot.mag;em.opt.VfloatCmplCompleteness (1)meta.notefloatPmem[0/1]? Cluster membership probability (2)stat.probabilityfloatnullable
J/A+A/561/A106/l2Star coordinates, magnitudes, completeness and membership probability for Lindsay2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainBmagB-Bessel magnitudemagphot.mag;em.opt.Bfloate_BmagError in B-Bessel magnitudemagstat.error;phot.mag;em.opt.BfloatVmagV-Bessel magnitudemagphot.mag;em.opt.Vfloate_VmagError in V-Bessel magnitudemagstat.error;phot.mag;em.opt.VfloatCmplCompleteness (1)meta.notefloatPmem[0/1]? Cluster membership probability (2)stat.probabilityfloatnullable
J/A+A/561/A106/l3Star coordinates, magnitudes, completeness and membership probability for Lindsay3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainBmagB-Bessel magnitudemagphot.mag;em.opt.Bfloate_BmagError in B-Bessel magnitudemagstat.error;phot.mag;em.opt.BfloatVmagV-Bessel magnitudemagphot.mag;em.opt.Vfloate_VmagError in V-Bessel magnitudemagstat.error;phot.mag;em.opt.VfloatCmplCompleteness (1)meta.notefloatPmem[0/1]? Cluster membership probability (2)stat.probabilityfloatnullable