J/MNRAS/431/1995ivo://CDS.VizieR/J/MNRAS/431/1995doi:10.26093/cds/vizier.74311995CDSBeccari G.Bellazzini M.Lardo C.Bragaglia A.Carretta E.,Dalessandro E.Mucciarelli A.Pancino E.2024-07-21T20:14:35Z2014-06-27T16:10:15ZCDS support team

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

cds-question@unistra.frglobular-star-clustersphotometryWe present accurate wide-field uVI photometry of the remote and massive Galactic globular cluster NGC 2419, aimed at searching for the u-V colour spread along the red giant branch (RGB) which is generally interpreted as the photometric signature of the presence of multiple populations in globular clusters. Focusing on the RGB stars in the magnitude range 19.8<=V<=22.0, we find that (i) the u-V, u-I and the V-I spreads about the RGB ridge line are significantly larger than that expected from observational errors, accurately quantified by means of extensive artificial stars experiments, (ii) the intrinsic colour spreads in u-V and u-I are larger than in V-I, and (iii) the stars lying to the blue of the RGB ridge line in u-V and u-I are significantly more concentrated towards the cluster centre than those lying to the red of that line. All the above observational facts can be interpreted in a scenario where a sizable fraction of cluster stars belong to a second generation heavily enriched in helium. Finally, we find that bright RGB stars (17.5<V<19.0) having [Mg/Fe]<0.0 lie preferentially on the red side of the cluster RGB, while those having [Mg/Fe]>0.0 lie preferentially on the blue side.2013MNRAS.431.1995Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/431/1995CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/PASP/117/37 : BVRI photometry in NGC 2419, Pal 4, and Pal 14 (Saha+, 2005)J/AJ/136/2259 : HST photometry of stars in NGC 2419 (Sandquist+, 2008)J/ApJ/681/311 : Blue stragglers in NGC 2419 (Dalessandro+, 2008)J/AJ/141/81 : NGC 2419 variable star population (Di Criscienzo+, 2011)J/ApJ/738/186 : HST and DEIMOS measurements of NGC 2419 stars (Ibata+, 2011)J/ApJ/740/60 : Equivalent widths for NGC2419 & NGC7099 RGB stars (Cohen+ 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/431/1995https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/431/1995http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/431/1995https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/431/1995https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/431/1995http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/431/1995GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/431/1995/catalog (The complete photometric catalogue of NGC 2419)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/431/1995/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/431/1995/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/431/1995/catalog?GETtext/xml+votable180.050000true114.4461041738.767594440.0055555555555555566/63892.367228618189496e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/431/1995?format=asciiOpticaldefaultJ/MNRAS/431/1995/catalogThe complete photometric catalogue of NGC 2419ID[100001/400598] Identification numbermeta.id;meta.mainintprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainumagu_spec_ (SDSS) magnitude from blue cameramagphot.mag;em.opt.Ufloate_umagrms uncertainty on umagmagstat.error;phot.mag;em.opt.UfloatVmagV magnitude from red cametamagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatImagI magnitude from red cametamagphot.mag;em.opt.Ifloate_Imagrms uncertainty on Imagmagstat.error;phot.mag;em.opt.Ifloat