J/A+A/615/A165ivo://CDS.VizieR/J/A+A/615/A165doi:10.26093/cds/vizier.36150165CDSBagdonas V.Drazdauskas A.Tautvaisiene G.Smiljanic R.Chorniy Y.2018-09-25T13:15:20Z2018-08-02T06:40:50ZCDS support team

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

cds-question@unistra.fropen-star-clustershorizontal-branch-starschemical-abundancesline-intensitiesHomogeneous investigations of red giant stars in open clusters contribute to studies of internal evolutionary mixing processes inside stars, which are reflected in abundances of mixing-sensitive chemical elements like carbon, nitrogen, and sodium, while {alpha}- and neutron-capture element abundances are useful in tracing the Galactic chemical evolution. The main aim of this study is a comprehensive chemical analysis of red giant stars in the open cluster IC 4756, including determinations of ^12^C/^13^C and C/N abundance ratios, and comparisons of the results with theoretical models of stellar and Galactic chemical evolution. We used a classical differential model atmosphere method to analyse high-resolution spectra obtained with the FEROS spectrograph on the 2.2m MPG/ESO Telescope. The carbon, nitrogen, and oxygen abundances, ^12^C/^13^C ratios, and neutron-capture element abundances were determined using synthetic spectra, and the main atmospheric parameters and abundances of other chemical elements were determined from equivalent widths of spectral lines.2018A&A...615A.165Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/615/A165CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/109/1903 : Membership to cluster IC 4756 (Missana+ 1995)J/AJ/134/1216 : Abundances of NGC 7142, 6939 and IC 4756 stars (Jacobson+ 2007)J/A+A/515/A28 : Abundances of dwarfs and giants in 2 open clusters (Pace+ 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/615/A165https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/615/A165http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/615/A165https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/615/A165https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/615/A165http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/615/A165GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/615/A165/table1 (A list of analysed stars and their parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/615/A165/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/615/A165/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/615/A165/table1?GETtext/xml+votable180.050000true278.94765.33810.0055555555555555566/30438-30439 30444-304453.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/615/A165?format=asciidefaultJ/A+A/615/A165/table1A list of analysed stars and their parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar identification number, IC 4665 NNN in Simbad (1)meta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagV magnitude (2)magphot.mag;em.opt.VfloatB-VB-V colour index (2)magphot.color;em.opt.B;em.opt.VfloatObs.DateObservation datetime.epoch;obsnullableExpTimeExposure timestime.duration;obs.exposureintRVRadial velocity (3)km/sphys.veloc;pos.heliocentricfloatl_S/N[~] Limit flag on S/Nmeta.code.errorcharS/NSignal-to-noise ration at ~64000{AA}stat.snrintEWDisplay the EW measurements (from table2)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/615/A165/table2The equivalent widths for individual lines in stars of IC 4756ElElementphys.atmol.elementcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmem.wlfloatEW12? Equivalent widths for star 120.1pmspect.line.eqWidthintnullableEW14? Equivalent widths for star 140.1pmspect.line.eqWidthintnullableEW28? Equivalent widths for star 280.1pmspect.line.eqWidthintnullableEW38? Equivalent widths for star 380.1pmspect.line.eqWidthintnullableEW42? Equivalent widths for star 420.1pmspect.line.eqWidthintnullableEW44? Equivalent widths for star 440.1pmspect.line.eqWidthintnullableEW52? Equivalent widths for star 520.1pmspect.line.eqWidthintnullableEW69? Equivalent widths for star 690.1pmspect.line.eqWidthintnullableEW81? Equivalent widths for star 810.1pmspect.line.eqWidthintnullableEW101? Equivalent widths for star 1010.1pmspect.line.eqWidthintnullableEW109? Equivalent widths for star 1090.1pmspect.line.eqWidthintnullableEW125? Equivalent widths for star 1250.1pmspect.line.eqWidthintnullableEW164? Equivalent widths for star 1640.1pmspect.line.eqWidthintnullable