J/MNRAS/463/580ivo://CDS.VizieR/J/MNRAS/463/580doi:10.26093/cds/vizier.74630580CDSBocek Topcu G.Afsar M.Sneden C.2024-08-16T20:19:18Z2018-06-22T14:51:42ZCDS support team

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

cds-question@unistra.fropen-star-clustersgiant-starsline-intensitiesWe present the high-resolution (R~=60000), high signal-to-noise ratio (S/N~=120) spectroscopic analysis of 12 red giant members of the Galactic open cluster NGC 6940. We applied Yonsei-Yale isochrones to the colour-magnitude diagram, which suggested an age of 1.1Gyr for the cluster with a turn-off mass of 2 M_{sun}_. Atmospheric parameters (T_eff_, logg, [Fe/H], and {xi}_t_) were determined via equivalent widths of FeI, FeII, TiI, and TiII lines. Calculated mean metallicity of the cluster is <[Fe/H]>=0.04+/-0.02. We derived abundances of {alpha} (Mg, Si, Ca), Fe-group (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn), and n-capture (Y, La, Nd, Eu) elements to be about solar. Light odd-Z elements Na and Al are slightly enhanced in MMU 108 and MMU 152 by ~0.34 and ~0.16dex, respectively. Abundances of light elements Li, C, N, O, and ^12^C/^13^C ratios were derived from spectrum syntheses of the LiI resonance doublet at 6707{AA}, [OI] line at 6300{AA}, C_2_ Swan bandheads at 5164 and 5635{AA}, and strong ^12,13^CN system lines in the 7995-8040{AA} region. Most carbon isotopic ratios are similar to those found in other solar-metallicity giants, but MMU 152 has an unusual value of ^12^C/^13^C=6. Evaluation of the LiCNO abundances and ^12^C/^13^C ratios along with the present theoretical models suggests that all the red giants in our sample are core-helium-burning clump stars.2016MNRAS.463..580Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/463/580CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/446/3562 : Abundances of red giants in NGC752 (Bocek Topcu+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/463/580https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/463/580http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/463/580https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/463/580https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/463/580http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/463/580GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/463/580/table2 (Basic parameters of observed NGC 6940 RGs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/463/580/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/463/580/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/463/580/table2?GETtext/xml+votable180.050000true308.3542333328.013047220.0055555555555555566/13195 131987.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/463/580?format=asciidefaultJ/MNRAS/463/580/table2Basic parameters of observed NGC 6940 RGsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEWDisplay the Equivalent Width for this starmeta.ref.urlcharStarStar name (MMUNNN)meta.id;meta.maincharn_StarNote on Star (1)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBmagB magnitude (Larsson-Leander, 1960StoAn..20i...1L)magphot.mag;em.opt.BfloatVmagV magnitude (Larsson-Leander, 1960StoAn..20i...1L)magphot.mag;em.opt.VfloatKmagK magnitude (Cutri et al., 2003, Cat. II/246/)magphot.mag;em.IR.KfloatVMAG0Deredenned absolute V magnitudemagphys.magAbsfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat(B-V)0Deredenned B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat(V-K)0Deredenned V-K colour indexmagphot.color;em.opt.V;em.IR.KfloatpmRAProper motion along RA (pmRA*cosDE)mas/yrpos.pm;pos.eq.rafloatpmDEProper motion along DEmas/yrpos.pm;pos.eq.decfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/463/580/table4Linelist of speciesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpeciesSpecies identification (1)meta.id;meta.maincharlambdaWavelength in Angstroms0.1nmem.wlfloatLEP? Lower Excitation potential of the transitioneVphys.atmol.excitation;stat.minfloatnullableloggf? Log of the oscillator strengthphys.atmol.oscStrengthfloatnullableEW/SynMethod of analysis. Equivalent width measurement or spectrum synthesis.meta.notecharRefReference for log(gf) (2)meta.ref;pos.framecharJ/MNRAS/463/580/table5Equivalent width measurements of the NGC 6940 RG membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpeciesSpecies identification (1)meta.id;meta.maincharlambdaWavelength0.1nmem.wlfloatMMU28? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU30? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU60? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU69? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU87? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU101? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU105? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU108? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU132? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU138? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU139? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullableMMU152? Equivalent width in milli-Angstroms (2)0.1pmspect.line.eqWidthfloatnullable