J/A+A/607/A44ivo://CDS.VizieR/J/A+A/607/A44doi:10.26093/cds/vizier.36070044CDSBragaglia A.Carretta E.D'Orazi V.Sollima A.Donati P.Gratton R.G.,Lucatello S.2019-07-04T11:29:56Z2017-11-08T11:27:17ZCDS support team

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

cds-question@unistra.frglobular-star-clusterschemical-abundancesspectroscopyTo understand globular clusters (GCs) we need to comprehend how their formation process was able to produce their abundance distribution of light elements. In particular, we need to figure out which stars imprinted the peculiar chemical signature of GCs. One of the best way is to study the light-element anti-correlations in a large sample of GCs, analysed homogeneously. As part of our spectroscopic survey of GCs with FLAMES, we present here the results of our study of about 30 red giant member stars in the low-mass, low-metallicity Milky Way cluster NGC 6535. We measured its metallicity (finding [Fe/H]=-1.95, rms=0.04dex in our homogeneous scale) and other elements, in particular we concentrate here on O and Na abundances. These elements define the normal Na-O anti-correlation of classical GCs, making NGC 6535 perhaps the lowest mass cluster with confirmed presence of multiple populations. We updated the census of Galactic and extragalactic GCs for which a statement on the presence or absence of multiple populations can be made on the basis of high-resolution spectroscopy preferentially, or photometry and low-resolution spectroscopy otherwise, discussing the importance of mass and age of the clusters.2017A&A...607A..44Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/607/A44CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/121/916 : HST obs. of NGC 2298, 5897, 6535, and 6626 (Testa+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/607/A44https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/607/A44http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/607/A44https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/607/A44https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/607/A44http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/607/A44GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/607/A44/table2 (Basic information on observed stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/607/A44/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/607/A44/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/607/A44/table2?GETtext/xml+votable180.050000true270.9715833-0.30692220.0055555555555555566/303788.650015785639275e-20 4.2441532724171825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/607/A44?format=asciidefaultJ/A+A/607/A44/table2Basic information on observed starsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar ID (from Testa et al., 2001, Cat. J/AJ/121/916)meta.id;meta.maincharInstrUVES (U) or GIRAFFE (G) spectrum acquiredmeta.id;instrcharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatV-I(V-I) colour indexmagphot.color;em.opt.V;em.opt.IfloatKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.KfloatnullableHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRVError on HRVkm/sstat.errorfloatMembMembership flag (M/NM?/NM)meta.code.errorchar2MASS2MASS identificationmeta.idcharq_2MASS2MASS quality flag for JHKmeta.code.qualchar