J/MNRAS/433/1892ivo://CDS.VizieR/J/MNRAS/433/1892doi:10.26093/cds/vizier.74331892CDSSimpson J.D.Cottrell P.L.2024-07-22T20:13:16Z2014-09-03T13:47:12ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starschemical-abundancesWe present the effective temperatures, surface gravities and abundances of iron, carbon and barium of 848 giant branch stars, of which 557 also have well-defined nitrogen abundances, of the globular cluster {omega} Centauri. This work used photometric sources and lower resolution spectra for this abundance analysis. Spectral indices were used to estimate the oxygen abundance of the stars, leading to a determination of whether a particular star was oxygen rich or oxygen poor. The 557-star subset was analysed in the context of evolutionary groups, with four broad groups identified. These groups suggest that there were at least four main periods of star formation in the cluster. The exact order of these star formation events is not yet understood. These results compare well with those found at higher resolution and show the value of more extensive lower resolution spectral surveys. They also highlight the need for large samples of stars when working with a complex object like {omega} Cen.2013MNRAS.433.1892Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/433/1892CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/427/1153 : Stellar parameters of giants in {omega} Cen (Simpson+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/433/1892https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/433/1892http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/433/1892https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/433/1892https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/433/1892http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/433/1892GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/433/1892/table3 (Stellar parameters determined for the 912 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/433/1892/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/433/1892/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/433/1892/table3?GETtext/xml+votable180.050000true201.2749167-47.15611110.0055555555555555566/43225 43227https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/433/1892?format=asciiOpticaldefaultJ/MNRAS/433/1892/table3Stellar parameters determined for the 912 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLEID[6/96011] LEID number (von Loon et al. 2007, Cat. J/MNRAS/382/1353) <Cl* NGC 5139 LEID NNNNN> in Simbadmeta.id;meta.mainint2MASS2MASS name (HHMMSSss+DDMMSSs)meta.idcharB+09[181/375016]? Identification number from Bellini et al. 2009A&A...507.1393Bmeta.idintnullableTeff[3650/6650] Effective temperatureKphys.temperature.effectiveintlogg[0.3/3.5] Surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H][-3.5/0.6] Metallicitylog(Sun)phys.abund.Zfloat[C/Fe][[-4.2/3.1] Abundance [C/Fe]log(Sun)phys.abund;meta.mainfloatprimaryindexed[N/Fe][-3.4/3.7] Abundance [N/Fe]log(Sun)phys.abundfloat[Ba/Fe][-3/4] Abundance [Ba/Fe]log(Sun)phys.abundfloat[O/Fe][-0.5/0.4] Abundance [O/Fe]log(Sun)phys.abundfloatGroup[1/4]? Group number (1)meta.idintnullableNote[NonMember ] Non membermeta.notechar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_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.main