J/MNRAS/476/114ivo://CDS.VizieR/J/MNRAS/476/114doi:10.26093/cds/vizier.74760114CDSHollyhead K.Lardo C.Kacharov N.Bastian N.Hilker M.Rejkuba M.,Koch A.Grebel E.K.Georgiev I.2024-08-18T20:18:20Z2021-05-05T12:47:33ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsstellar-associationsgiant-starseffective-temperaturechemical-abundancesWe present the results of a spectroscopic study of the intermediate age (~=6.5Gyr) massive cluster Kron 3 in the Small Magellanic Cloud. We measure CN and CH band strengths (at ~=3839 and 4300{AA}, respectively) using VLT FORS2 spectra of 16 cluster members and find a sub-population of five stars enriched in nitrogen. We conclude that this is evidence for multiple populations in Kron 3, the fourth intermediate age cluster, after Lindsay 1, NGC 416 and NGC 339 (ages 6-8Gyr), to display this phenomenon originally thought to be a unique characteristic of old globular clusters. At ~=6.5Gyr this is one of the youngest clusters with multiple populations, indicating that the mechanism responsible for their onset must operate until a redshift of at least 0.75, much later than the peak of globular cluster formation at redshift ~3.2018MNRAS.476..114Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/476/114CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/476/114https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/476/114http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/476/114https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/476/114https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/476/114http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/476/114GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/476/114/table1 (*Stellar properties for all 35 stars in our programme)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/476/114/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/476/114/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/476/114/table1?GETtext/xml+votable180.050000true6.1355019-72.824570.0055555555555555566/333153.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/476/114?format=asciidefaultJ/MNRAS/476/114/table1*Stellar properties for all 35 stars in our programmerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? rms uncertainty on TeffKstat.error;phys.temperature.effectiveintnullablelogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? rms uncertainty on logglog(cm.s**-2)stat.errorfloatnullable[C/Fe]? Abundance [C/Fe]phys.abundfloatnullablee_[C/Fe]? rms uncertainty on [C/Fe]stat.error;phys.abundfloatnullable[N/Fe]? Abundance [N/Fe]phys.abundfloatnullablee_[N/Fe]? rms uncertainty on [N/Fe]stat.error;phys.abundfloatnullableCN? CN indexmagspect.indexfloatnullablee_CN? rms uncertainty on CNmagstat.errorfloatnullableCH? CH indexmagspect.indexfloatnullablee_CH? rms uncertainty on CHmagstat.errorfloatnullableCa(HK)? Ca(HK) indexmagspect.indexfloatnullablee_Ca(HK)? rms uncertainty on Ca(HK)magstat.errorfloatnullableFe? Fe indexmagspect.indexfloatnullablee_Fe? rms uncertainty on Femagstat.error;phys.abund.FefloatnullableRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatNotesNotesmeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar