J/AJ/157/70ivo://CDS.VizieR/J/AJ/157/70doi:10.26093/cds/vizier.51570070CDSPereira C.B.Holanda N.Drake N.A.Roig F.2019-07-24T13:13:02Z2019-06-06T14:08:36ZCDS support team

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

cds-question@unistra.frgiant-starsspectroscopyeffective-temperaturemetallicitySodium-rich stars are often found in globular clusters giants. However, some sodium-rich stars have been found among field metal-poor stars. These stars are considered as evaporated from globular clusters. Identified such kind of stars among the field stars in the Galaxy may provide insights of which mechanism was responsible for the ejection from a globular cluster and may reveal some chemical peculiarity. Therefore, we started a search, using high-resolution spectroscopy, among metal-poor stars from several sources of the literature to find a sodium-rich star. Here we present the results for the temperature, gravity, metallicity, and sodium abundances for the stars of our sample. For many of them we determined the temperature, gravity, metallicity, and sodium abundances for the first time. As a result of our search we found one star, CD-23{deg}16310, which has a [Na/Fe] ratio of +1.09. We also show that CD-23{deg}16310 is not a carbon-enhanced metal-poor (CEMP) star since carbon is not enriched but is nitrogen-rich. We did not detect any variation of the radial velocity that would support the hypothesis of mass transfer. Thus, the high sodium and nitrogen abundance could be due to a strong internal mixing process, suggesting that CD-23{deg}16310 is an early asymptotic giant branch star.2019AJ....157...70Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/70CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/46 : Ap and Am Stars (Bertaud+ 1974; Bidelman+ 1973)J/PASP/107/846 : LSE stars, extension of Case-Hamburg surveys. (Drilling+ 1995)J/A+A/356/238 : Atmospheric parameters in metal-poor stars. III.J/AN/331/474 : Abundances of metal-poor stars (Frebel, 2010)J/ApJ/771/67 : Detailed abundances for 97 metal-poor stars. II.J/ApJ/794/58 : Metal-poor stars in the thick disk of the Galaxyhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/70https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/157/70http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/157/70https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/157/70https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/157/70http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/157/70GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/157/70/table1 (Log of the observations, V magnitude of the stars, and the source from where the stars were selected)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/70/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/70/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/70/table1?GETtext/xml+votable180.050000true182.3304053-29.54226440.0055555555555555566/16821 18051 18968 23428 24591 24657 24681 24687 24733 24779 24833 26808 29703 30849 33143 34251 34593 35649 35907 36414 40526 40979 42242 43430 43503 43595 43728 43756 43768 43824 43836 43848 43911 46471 46510 46605 47017 47222 47498 48663 48728https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/157/70?format=asciidefaultJ/AJ/157/70/table1Log of the observations, V magnitude of the stars, and the source from where the stars were selectedSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifiermeta.id;meta.mainr_Star[abcd] Original source from which the star was selected (G1)meta.ref;pos.framecharDateDate of observationtime.epochnullableTexpExposure timestime.duration;obs.exposurecharVmag[7.6/11.8]? Visual magnitudemagphot.mag;em.opt.Vfloatnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/AJ/157/70/table2Adopted atmospheric parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identifiermeta.id;meta.mainr_Star[abcd] Original source from which the star was selected (G1)meta.ref;pos.framecharTeff[4250/6000] Effective temperatureKphys.temperature.effectiveintlogg[0.2/2.8] Surface gravitylog(cm.s**-2)phys.gravityfloat[FeI/H][-2.88/-0.98] Abundance of Fe Iphys.abundfloate_[FeI/H][0.06/0.12] Uncertainty in [FeI/H]stat.error;phys.abundfloato_FeI[39/113] Number of Fe I absorption lines used for the determination of atmospheric parametersmeta.numberint[FeII/H][-2.87/-0.97] Abundance of Fe IIphys.abund.Fefloate_[FeII/H][0.05/0.14] Uncertainty in [FeII/H]stat.error;phys.abundfloato_FeII[6/17] Number of Fe II absorption lines used for the determination of atmospheric parametersmeta.numberintxi[1.2/2.8] Microturbulence {xi}km/sphys.veloc.microTurbfloat