J/AJ/154/155ivo://CDS.VizieR/J/AJ/154/155doi:10.26093/cds/vizier.51540155CDSJohnson C.I.Caldwell N.Rich R.M.Walker M.G.2018-08-27T07:44:10Z2018-08-02T08:30:19ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starsinfrared-photometryradial-velocityeffective-temperaturechemical-abundancesNGC 6229 is a relatively massive outer halo globular cluster that is primarily known for exhibiting a peculiar bimodal horizontal branch morphology. Given the paucity of spectroscopic data on this cluster, we present a detailed chemical composition analysis of 11 red giant branch members based on high resolution (R~38000), high S/N (>100) spectra obtained with the MMT-Hectochelle instrument. We find the cluster to have a mean heliocentric radial velocity of -138.1_-1.0_^+1.0^ km/s, a small dispersion of 3.8_-0.7_^+1.0^ km/s, and a relatively low (M/L_V_)_{sun}_=0.82_-0.28_^+0.49^. The cluster is moderately metal-poor with <[Fe/H]>=-1.13 dex and a modest dispersion of 0.06 dex. However, 18% (2/11) of the stars in our sample have strongly enhanced [La,Nd/Fe] ratios that are correlated with a small (~0.05 dex) increase in [Fe/H]. NGC 6229 shares several chemical signatures with M75, NGC 1851, and the intermediate metallicity populations of {omega} Cen, which lead us to conclude that NGC 6229 is a lower mass iron-complex cluster. The light elements exhibit the classical (anti-)correlations that extend up to Si, but the cluster possesses a large gap in the O-Na plane that separates first and second generation stars. NGC 6229 also has unusually low [Na,Al/Fe] abundances that are consistent with an accretion origin. A comparison with M54 and other Sagittarius clusters suggests that NGC 6229 could also be the remnant core of a former dwarf spheroidal galaxy.2017AJ....154..155Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/154/155CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/AJ/101/1699 : Photometry in globular cluster NGC 6229 (Carney+, 1991)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/154/155https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/154/155http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/154/155https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/154/155https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/154/155http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/154/155GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/154/155/table1 (Star Identifiers, Coordinates, Photometry, and Velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/155/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/155/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/155/table1?GETtext/xml+votable180.050000true251.6796030647.5176050.0055555555555555566/10008 100108.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/154/155?format=asciiInfrareddefaultJ/AJ/154/155/catalogModel atmosphere parameters (table 2) , chemical abundances and uncertainties: oxygen to calcium (table 4) and chromium to neodymium (table 5)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS star name (HHMMSSss+DDMMSSs)meta.id;meta.maincharTeff[3925/4450]? Effective temperatureKphys.temperature.effectiveintnullablelogg[0.7/1.6]? Surface gravity (in cgs units)log(cm.s**-2)phys.gravityfloatnullable[Fe/H][-1.23/-1.04]? Metallicity (in dex)phys.abund.Zfloatnullablee_[Fe/H][0.04/0.05]? Uncertainty in [Fe/H]stat.error;phys.abund.Fefloatnullableksi[1.4/2.2]? Microturbulence velocity {ksi}_mic_km/sphys.veloc.microTurbfloatnullable[O/Fe][-0.11/0.71]? [O/Fe] abundance (in dex)phys.abundfloatnullablee_[O/Fe][0.07]? Uncertainty in [O/Fe] (in dex)stat.error;phys.abundfloatnullable[Na/Fe][-0.58/0.25]? [Na/Fe] abundance (in dex)phys.abundfloatnullablee_[Na/Fe][0.11]? Uncertainty in [Na/Fe] (in dex)stat.error;phys.abundfloatnullable[Mg/Fe][0.05/0.34]? [Mg/Fe] abundance (in dex)phys.abundfloatnullablee_[Mg/Fe][0.06]? Uncertainty in [Mg/Fe] (in dex)stat.error;phys.abundfloatnullable[Al/Fe][-0.45/0.39]? [Al/Fe] abundance (in dex)phys.abundfloatnullablee_[Al/Fe][0.1]? Uncertainty in [Al/Fe] (in dex)stat.error;phys.abundfloatnullable[Si/Fe][0.18/0.38]? [Si/Fe] abundance (in dex)phys.abundfloatnullablee_[Si/Fe][0.08/0.14]? Uncertainty in [Si/Fe] (in dex)stat.error;phys.abundfloatnullable[Ca/Fe][0.06/0.34]? [Ca/Fe] abundance (in dex)phys.abundfloatnullablee_[Ca/Fe][0.12]? Uncertainty in [Ca/Fe] (in dex)stat.error;phys.abundfloatnullable[Cr/Fe][-0.13/0.06]? [Cr/Fe] abundance (in dex)phys.abundfloatnullablee_[Cr/Fe][0.12/0.14]? Uncertainty in [Cr/Fe] (in dex)stat.error;phys.abundfloatnullable[Ni/Fe][-0.19/-0.05]? [Ni/Fe] abundance (in dex)phys.abundfloatnullablee_[Ni/Fe][0.03/0.06]? Uncertainty in [Ni/Fe] (in dex)stat.error;phys.abundfloatnullable[Cu/Fe][-0.53/-0.39]? [Cu/Fe] abundance (in dex)phys.abundfloatnullablee_[Cu/Fe][0.09]? Uncertainty in [Cu/Fe] (in dex)stat.error;phys.abundfloatnullable[Zr/Fe][0.21/0.87]? [Zr/Fe] abundance (in dex)phys.abundfloatnullablee_[Zr/Fe][0.12/0.17]? Uncertainty in [Zr/Fe] (in dex)stat.error;phys.abundfloatnullable[La/Fe][0.22/0.99]? [La/Fe] abundance (in dex)phys.abundfloatnullablee_[La/Fe][0.05/0.08]? Uncertainty in [La/Fe] (in dex)stat.error;phys.abundfloatnullable[Nd/Fe][0.2/0.86]? [Nd/Fe] abundance (in dex)phys.abundfloatnullablee_[Nd/Fe][0.05/0.14]? Uncertainty in [Nd/Fe] (in dex)stat.error;phys.abundfloatnullableJ/AJ/154/155/table1Star Identifiers, Coordinates, Photometry, and VelocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMemb[MN] Cluster membership flag (M=Cluster member, N=Non-member)meta.code.errorchar2MASS2MASS star name (HHMMSSss+DDMMSSs)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJmag[12.315/14.893] 2MASS J band magnitudemagphot.mag;em.IR.JfloatHmag[11.463/14.527] 2MASS H band magnitudemagphot.mag;em.IR.HfloatKsmag[11.283/14.158] 2MASS K_s_ band magnitudemagphot.mag;em.IR.KfloatHRV[-162.7/7.9] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[0.2/33.3] Uncertainty in HRVkm/sstat.errorfloat2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/AJ/154/155/table3Line List and Adopted Reference AbundancesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[5731.76/6862.48] Wavelength ({AA})0.1nmem.wlfloatSpeciesSpecies identifiermeta.id;meta.maincharEP[0/5.86] Lower excitation potentialeVphys.atmol.excitation;stat.minfloatlog(gf)[-9.75/-0.183]? Log of the oscillator strengthphys.atmol.oscStrengthfloatnullablen_log(gf)[hfs ] Note on log(gf) (1)meta.notecharlogEsun[1.13/8.69] Adopted solar abundance log{epsilon}(X)_{sun}_ (in dex)phys.abundfloatlogeEarc[0.57/8.63] Adopted Arcturus abundance log{epsilon}(X)_Arcturus_ (in dex)phys.abundfloat