J/AJ/146/39ivo://CDS.VizieR/J/AJ/146/39doi:10.26093/cds/vizier.51460039CDSKatime Santrich O.J.Pereira C.B.de Castro D.B.2026-03-18T11:49:00Z2014-06-26T06:40:05ZCDS support team

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

cds-question@unistra.fropen-star-clustersbarium-starsline-intensitiesOpen clusters are very useful examples to explain the constraint of the nucleosynthesis process with the luminosities of stars because the distances of the clusters are better known than those of field stars. We carried out a detailed spectroscopic analysis to derive the chemical composition of two red giants in the young open cluster NGC 5822, NGC 5822-2, and NGC 5822-201. We obtained abundances of C, N, O, Na, Mg, Al, Ca, Si, Ti, Ni, Cr, Y, Zr, La, Ce, and Nd. The atmospheric parameters of the studied stars and their chemical abundances were determined using high-resolution optical spectroscopy. We employed the local thermodynamic equilibrium model atmospheres of Kurucz and the spectral analysis code MOOG. The abundances of the light elements were derived using the spectral synthesis technique. We found that NGC 5822-2 and -201 have, respectively, a mean overabundance of the elements created by the s-process, "s," with the notation [s/Fe] of 0.77+/-0.12 and 0.83+/-0.05. These values are higher than those for field giants of similar metallicity. We also found that NGC 5822-2 and -201 have, respectively, luminosities of 140L_{sun}_ and 76L_{sun}_, which are much lower than the luminosity of an asymptotic giant branch star. We conclude that NGC 5822-2 and NGC 5822-201 are two new barium stars first identified in the open cluster NGC 5822. The mass transfer hypothesis is the best scenario to explain the observed overabundances.2013AJ....146...39Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/39CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/81 : Taxonomy of Barium Stars (Lu 1991)I/108 : Cape Photographic Durchmusterung (Gill+ 1895-1900)J/A+A/533/A51 : Abundances of 12 metal-rich barium stars (Pereira+, 2011)J/A+A/515/A28 : Abundances of dwarfs & giants in 2 open clusters (Pace+, 2010)J/A+A/502/267 : EWs of 31 giant stars of 10 open clusters (Smiljanic+, 2009)J/A+A/485/303 : Radial velocities for 1309 stars & 166 OCl (Mermilliod+, 2008)J/A+A/454/917 : Abundances of 26 barium stars. II. (Allen+, 2006)J/AZh/81/658 : Equivalent widths of 9 barium stars (Antipova+, 2004)J/AZh/80/704 : Studies of classical barium stars (Antipova+, 2003)J/A+A/397/257 : Chemical compositions of four barium stars (Liang+, 2003)J/AZh/79/909 : Chemical abundances in barium stars (Boyarchuk+, 2002)J/A+A/319/881 : Ba II strength of barium stars (Gomez+ 1997)J/PASP/105/78 : Photometry in open cluster NGC 5822 (Twarog+, 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/39https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/146/39http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/146/39https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/146/39https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/146/39http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/146/39GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/146/39/table1 (Log of the observations and other relevant information for the target stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/146/39/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/146/39/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/146/39/table1?GETtext/xml+votable180.050000true225.92223333-54.375786110.0055555555555555566/39345 41834https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/146/39?format=asciidefaultJ/AJ/146/39/table1Log of the observations and other relevant information for the target starsSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (1)meta.id;meta.maincharCPDCPD identifier (1)meta.idcharVmagV-band magnitude (1)magphot.mag;em.opt.VfloatB-VThe B-V color index (1)magphot.color;em.opt.B;em.opt.VfloatRV1Radial velocity (1)km/sspect.dopplerVelocfloatRV2? Radial velocity from our workkm/sspect.dopplerVelocfloatnullablee_RV2? Uncertainty in RV2km/sstat.errorfloatnullableDate? Date of observationtime.epochnullableExp? Exposure timestime.duration;obs.exposureintnullableRA_ICRSRight ascension (ICRS), hours (2)pos.eq.ra;meta.mainDE_ICRSDeclination (ICRS), degrees (2)pos.eq.dec;meta.mainLinesEquivalent widths observed for this starmeta.ref.urlcharJ/AJ/146/39/table2Observed FeI and FeII linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonIron line identifier (FeI or FeII)phys.atmol.ionStagecharlambdaWavelength; in {AA}0.1nmem.wlfloatLEPLower excitation potential of the transitioneVphys.atmol.excitation;stat.minfloatloggfLog of the oscillator strength (1)phys.atmol.oscStrengthfloatEW2? Equivalent width for NGC 5822-20.1pmspect.line.eqWidthintnullableEW201? Equivalent width for NGC 5822-2010.1pmspect.line.eqWidthintnullableEW65314? Equivalent width for HD 653140.1pmspect.line.eqWidthintnullableJ/AJ/146/39/table3Other lines studiedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength; in {AA}0.1nmem.wlfloatIonIron line identifierphys.atmol.ionStagecharLEPLower excitation potential of the transitioneVphys.atmol.excitation;stat.minfloatloggfLog of the oscillator strengthphys.atmol.oscStrengthfloatr_loggfReference for loggf; in refs.dat filemeta.ref;pos.framecharEW2? Equivalent width for NGC 5822-20.1pmspect.line.eqWidthintnullableEW201? Equivalent width for NGC 5822-2010.1pmspect.line.eqWidthintnullableEW65314? Equivalent width for HD 653140.1pmspect.line.eqWidthintnullableJ/AJ/146/39/refsReferencesAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.maincharBibCodeBibliographic codemeta.bib.bibcodechar