J/A+A/590/A50ivo://CDS.VizieR/J/A+A/590/A50doi:10.26093/cds/vizier.35900050CDSPiatti A.E.Bastian N.2016-05-10T07:13:15Z2016-05-10T08:12:50ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsstellar-associationsdwarf-starsvisible-astronomysloan-photometryWe present an imaging analysis of four low mass stellar clusters (<~5000M_{sun}_) in the outer regions of the LMC in order to shed light on the extended main sequence turn-off (eMSTO) phenomenon observed in high mass clusters. The four clusters have ages between 1-2Gyr and two of them appear to host eMTSOs. The discovery of eMSTOs in such low mass clusters - more than 5 times less massive than the eMSTO clusters previously studied - suggests that mass is not the controlling factor in whether clusters host eMSTOs. Additionally, the narrow extent of the eMSTO in the two older clusters (~2Gyr) is in agreement with predictions of the stellar rotation scenario, as lower mass stars are expected to be magnetically braked, meaning that their colour magnitude diagrams should be better reproduced by canonical simple stellar populations. We also performed a structural analysis on all the clusters and found that a large core radius is not a requisite for a cluster to exhibit an eMSTO.2016A&A...590A..50Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/590/A50CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/565/A121 : Abundances of 47 Tuc turn-off stars (Dobrovolskas+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/590/A50https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/590/A50http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/590/A50https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/590/A50https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/590/A50http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/590/A50GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/590/A50/table2 (Magnitudes and colours of stars in the field of LW 477)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/590/A50/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/590/A50/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/590/A50/table2?GETtext/xml+votable180.050000true96.34966667-71.626494440.005555555555555556Cone search capability for table J/A+A/590/A50/table3 (Magnitudes and colours of stars in the field of LW 483)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/590/A50/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/590/A50/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/590/A50/table3?GETtext/xml+votable180.050000true98.39529167-71.108163890.005555555555555556Cone search capability for table J/A+A/590/A50/table4 (Magnitudes and colours of stars in the field of KMHK 1751)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/590/A50/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/590/A50/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/590/A50/table4?GETtext/xml+votable180.050000true96.23179583-66.542252780.005555555555555556Cone search capability for table J/A+A/590/A50/table5 (Magnitudes and colours of stars in the field of KMHK 1754)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/590/A50/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/590/A50/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/590/A50/table5?GETtext/xml+votable180.050000true96.54787083-67.959377780.0055555555555555566/37419 37422 37518 37542https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/590/A50?format=asciiOpticaldefaultJ/A+A/590/A50/table2Magnitudes and colours of stars in the field of LW 477recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.maingmagg magnitudemagphot.mag;em.opt.Bfloate_gmagrms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatg-ig-i colour indexmagphot.color;em.opt.B;em.opt.Ifloate_g-irms uncertainty on g-imagstat.errorfloato_gmagNumber of observationsmeta.numberintJ/A+A/590/A50/table3Magnitudes and colours of stars in the field of LW 483gmagg magnitudemagphot.mag;em.opt.BfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.maine_gmagrms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatg-ig-i colour indexmagphot.color;em.opt.B;em.opt.Ifloate_g-irms uncertainty on g-imagstat.errorfloato_gmagNumber of observationsmeta.numberintJ/A+A/590/A50/table4Magnitudes and colours of stars in the field of KMHK 1751IDStar numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.maingmagg magnitudemagphot.mag;em.opt.Bfloate_gmagrms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatg-ig-i colour indexmagphot.color;em.opt.B;em.opt.Ifloate_g-irms uncertainty on g-imagstat.errorfloato_gmagNumber of observationsmeta.numberintJ/A+A/590/A50/table5Magnitudes and colours of stars in the field of KMHK 1754RAJ2000Right ascension (J2000)pos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar numbermeta.id;meta.mainintDEJ2000Declination (J2000)pos.eq.dec;meta.maingmagg magnitudemagphot.mag;em.opt.Bfloate_gmagrms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatg-ig-i colour indexmagphot.color;em.opt.B;em.opt.Ifloate_g-irms uncertainty on g-imagstat.errorfloato_gmagNumber of observationsmeta.numberint