Stellar [Fe/H] and [Na/H] in NGC6752 J/A+A/557/A128 ivo://CDS.VizieR/J/A+A/557/A128 doi:10.26093/cds/vizier.35570128 CDS Carretta E. 2017-09-29T09:03:21Z 2013-09-20T12:59:52Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr globular-star-clusters chemical-abundances We present a new method to estimate the fraction of stars with chemical composition of first and second(s) generation(s) currently hosted in Galactic globular clusters (GCs). We compare cluster and field stars of similar metallicity in the [Fe/H]-[Na/H] plane. Since the phenomenon of multiple populations is only restricted to the cluster environment, the number of GC stars whose location coincides with that of field stars provides the fraction of first generation stars in that cluster. By exclusion, the fraction of second generation stars is derived. We assembled a dataset of 1891 field stars of the thin disk, thick disk, and halo of the Milky Way in the metallicity range -3.15<=[Fe/H]<=+0.48dex and with Na abundance from high resolution spectra. They are mostly dwarfs, but include also giants. Considering only the range in metallicity spanned by most GCs extensively studied for the Na-O anticorrelation (-2.36<=[Fe/H]<=-0.33dex), we have 804 stars. The total sample is homogeneized by offsets in [Fe/H] and [Na/H] with respect to a reference sample using the same line list and NLTE correction for Na adopted in a recent extensive survey of GC stars. This fully accounts for offsets among analyses due to different temperature scales, line lists, adopted (or neglected) corrections for departures from LTE. We illustrate our method estimating the fraction of first and second generation stars in the well studied GC NGC 6752. As a by-product, the comparison of [Na/H] values in GC and field stars suggests that at least two classes of old stellar systems probably contributed to the halo assembly: one group with characteristics similar to the currently existing GCs, and the other more similar to the present-day dwarf satellite galaxies. 2013A&A...557A.128C https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/557/A128 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) J/AJ/120/1841 : Halo & disk stars abundances and kinematics (Fulbright 2000) J/A+A/354/169 : Metal-poor field stars abundances (Gratton+, 2000) J/A+A/356/238 : Metal-poor stars atmospheric parameters III (Carretta+ 2000) J/A+A/404/187 : Equivalent widths for metal-poor stars (Gratton+, 2003) J/A+AS/141/491 : Chemical composition of halo and disk stars (Nissen+, 2000) J/A+A/433/185 : 102 F & G dwarfs detailed abundance analysis (Bensby+, 2005) J/A+A/440/321 : Chemical abundances in 43 metal-poor stars (Jonsell+, 2005) J/A+A/440/901 : Reddening and metallicity of NGC 6752 (Gratton, 2005) J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006) J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010) J/A+A/464/927 : Abundances of red giants in NGC 6752 (Carretta+, 2007) J/AZh/88/750 : Galactic sub-structures stars abundances (Mishenina+, 2011) J/A+A/545/A32 : Chemical abundances of 1111 stars (Adibekyan+, 2012) J/MNRAS/423/2901 : NGC 6752 multiwavelength survey (Thomson+, 2012) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/557/A128 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/557/A128 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/557/A128 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/557/A128 https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/557/A128 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/557/A128 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/A+A/557/A128/table2 (ID, coordinates, atmospheric parameters, [Fe/H] and [Na/H] abundances) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/557/A128/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/557/A128/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/557/A128/table2? 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46506 46511 46526 46558-46559 46593 46639-46640 46646 46664 46671 46681 46685 46687 46705 46713 46728 46734 46768 46776 46800 46805 46829 46874 46909 46923 46936 46944 46967 46971 46978 46983 46997 47004 47020 47022 47030 47045 47061 47065 47073 47077 47137 47147 47157 47184 47198 47253 47308 47347 47364 47377 47387 47390 47407 47510 47567 47575 47590 47596 47600 47629 47647 47655 47674 47712 47740 47780 47795 47858 47876 47898 47903 47930 47942 48014 48022 48050 48065 48105 48113 48172 48177 48182 48205 48260 48282-48283 48335 48345 48350 48361-48362 48367 48371 48394 48402 48478 48490 48513 48519 48530 48545 48581 48583 48607 48613 48636 48652 48664 48679 48687 48705 48707 48727 48731 48736 48768 48792 48798 48821 48824 48846 48865 48870-48871 48882-48883 48943 48967 48980 49001 49010 49028 49036 49042 49060 49064 49078 49097 49106 49114 49128 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/557/A128?format=ascii Optical default J/A+A/557/A128/table2 ID, coordinates, atmospheric parameters, [Fe/H] and [Na/H] abundances SimbadName Simbad column added by the CDS meta.id char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Seq [1/1891] Star Sequential number meta.record int Name Star name (HR, HD, BD, CD, or G identification) meta.id;meta.main char logg ? Surface gravity log(cm.s**-2) phys.gravity float nullable Teff ? Effective temperature K phys.temperature.effective int nullable [Fe/H] [-3.15/0.48] Average [Fe/H] (2) log(Sun) phys.abund.Fe;stat.mean float [Na/H] [-3.44/0.94] Average [Na/H] (2) log(Sun) phys.abund float Code Sample code (1) meta.ref;pos.frame char Hip Hipparcos (Cat. I/239) number meta.id int RAJ2000 Right ascension (J2000.0) pos.eq.ra;meta.main DEJ2000 Declination (J2000.0) pos.eq.dec;meta.main