J/ApJ/780/94ivo://CDS.VizieR/J/ApJ/780/94doi:10.26093/cds/vizier.17800094CDSCordero M.J.Pilachowski C.A.Johnson C.I.McDonald I.Zijlstra A.A.,Simmerer J.2017-10-09T13:33:38Z2015-02-02T07:32:14ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starseffective-temperaturechemical-abundancesstellar-distance47 Tuc is an ideal target to study chemical evolution and globular cluster (GC) formation in massive more metal-rich GCs, as it is the closest massive GC. We present chemical abundances for O, Na, Al, Si, Ca, Ti, Fe, Ni, La, and Eu in 164 red giant branch stars in the massive GC 47 Tuc using spectra obtained with both the Hydra multifiber spectrograph at the Blanco 4m telescope and the FLAMES multiobject spectrograph at the Very Large Telescope. We find an average [Fe/H]=-0.79+/-0.09dex, consistent with literature values, as well as overabundances of alpha-elements ([{alpha}/Fe]~0.3dex). The n-capture process elements indicate that 47 Tuc is r process-dominated ([Eu/La]=+0.24), and the light elements O, Na, and Al exhibit star-to-star variations. The Na-O anticorrelation, a signature typically seen in Galactic GCs, is present in 47 Tuc, and extends to include a small number of stars with [O/Fe]~-0.5. Additionally, the [O/Na] ratios of our sample reveal that the cluster stars can be separated into three distinct populations. A Kolmogorov-Smirnov test demonstrates that the O-poor/Na-rich stars are more centrally concentrated than the O-rich/Na-poor stars. The observed number and radial distribution of 47 Tuc's stellar populations, as distinguished by their light element composition, agrees closely with the results obtained from photometric data. We do not find evidence supporting a strong Na-Al correlation in 47 Tuc, which is consistent with current models of asymptotic giant branch nucleosynthesis yields.2014ApJ...780...94Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/780/94CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/202 : Globular Clusters in the Milky Way (Harris, 1997)J/A+A/550/A34 : Abundances of red giants in M4 and 47 Tuc (Carretta+, 2013)J/ApJS/193/23 : Fundamental stellar parameters in 47 Tucanae (McDonald+, 2011)J/ApJ/713/L1 : Lithium and proton-capture elements in 47 Tuc (D'Orazi+, 2010)J/A+A/505/139 : Abundances of red giants in 17 GCs (Carretta+, 2009)J/A+A/505/117 : Abundances of red giants in 15 GCs (Carretta+, 2009)J/AJ/135/1551 : Abundances of stars in 47 Tuc (Koch+, 2008)J/A+A/435/657 : Equivalent widths of 5 giants in 47 Tuc (Alves-Brito+, 2005)J/A+AS/93/293 : Astrometry of globular clusters (47 Tuc) (Tucholke 1992)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/780/94https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/780/94http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/780/94https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/780/94https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/780/94http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/780/94GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/780/94/table2 (Atmospheric parameters and abundances)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/780/94/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/780/94/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/780/94/table2?GETtext/xml+votable180.050000true5.85625-72.23197220.0055555555555555566/33321 33323https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/780/94?format=asciiOpticaldefaultJ/ApJ/780/94/table2Atmospheric parameters and abundancesSimbadNameSimbad column added by the CDSmeta.idcharVt[1.35/2.6] Microturbulent velocitykm/sphys.velocfloatStarStar identificationmeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrument (Hydra or FLAMES) (1)meta.id;instrcharr_Star[DEFMTt] Reference for identification number (2)meta.ref;pos.framecharNMultiple observations for this starmeta.numberintnullableTeff[3650/5525] Effective temperatureKphys.temperature.effectiveintlogg[0.41/2.87] Log of the surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H][-1/-0.55] Metallicitylog(Sun)phys.abund.Zfloat[O/Fe][-0.52/0.6]? Log O/Fe number abundance ratiolog(Sun)meta.idfloatnullable[Na/Fe][-0.05/222]? Log Na/Fe number abundance ratiolog(Sun)meta.idfloatnullable[Al/Fe][-0.09/0.775]? Log Al/Fe number abundance ratiolog(Sun)meta.idfloatnullable[Si/Fe][0.01/0.65]? Log Si/Fe number abundance ratiolog(Sun)meta.idfloatnullable[Ca/Fe][-0.09/0.47]? Log Ca/Fe number abundance ratiolog(Sun)meta.idfloatnullable[Ti/Fe][-0.11/0.59]? Log Ti/Fe number abundance ratiolog(Sun)meta.idfloatnullable[Ni/Fe][-0.25/0.2]? Log Ni/Fe number abundance ratiolog(Sun)meta.idfloatnullable[La/Fe][-0.12/11111]? Log La/Fe number abundance ratiolog(Sun)phys.abunddoublenullable[Eu/Fe][0.04/0.83]? Log Eu/Fe number abundance ratiolog(Sun)phys.abundfloatnullablePopPopulation generation (P=Primordial, I=Intermediate, IE=Intermediate-Extreme)meta.codecharDist[0.88/21.23]? Distance from 47 Tuc center (RA=00:24:05.67, Dec=-72:04:52.6; J2000)arcminpos.angDistancefloatnullable_RAPositions from SIMBAD database, or from McDonald et al. 2011 (cat. J/ApJS/193/23) for stars flagged with a 'M' in column r_Star (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database, or from McDonald et al. 2011 (cat. J/ApJS/193/23) for stars flagged with a 'M' in column r_Star (declination part)degpos.eq.dec;meta.main