J/AJ/155/71ivo://CDS.VizieR/J/AJ/155/71doi:10.26093/cds/vizier.51550071CDSJohnson C.I.Rich R.M.Caldwell N.Mateo M.Bailey J.I.Olszewski E.W.,Walker M.G.2018-11-23T11:27:22Z2018-10-17T06:20:47ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyglobular-star-clustersgiant-starshorizontal-branch-starsinfrared-photometryradial-velocitychemical-abundancesline-intensitiesPhotometric and spectroscopic analyses have shown that the Galactic bulge cluster Terzan 5 hosts several populations with different metallicities and ages that manifest as a double red horizontal branch (HB). A recent investigation of the massive bulge cluster NGC 6569 revealed a similar, though less extended, HB luminosity split, but little is known about the cluster's detailed chemical composition. Therefore, we have used high-resolution spectra from the Magellan-M2FS and VLT-FLAMES spectrographs to investigate the chemical compositions and radial velocity distributions of red giant branch and HB stars in NGC 6569. We found the cluster to have a mean heliocentric radial velocity of -48.8 km/s ({sigma}=5.3 km/s; 148 stars) and <[Fe/H]>=-0.87 dex (19 stars), but the cluster's 0.05 dex [Fe/H] dispersion precludes a significant metallicity spread. NGC 6569 exhibits light- and heavy-element distributions that are common among old bulge/inner Galaxy globular clusters, including clear (anti)correlations between [O/Fe], [Na/Fe], and [Al/Fe]. The light-element data suggest that NGC 6569 may be composed of at least two distinct populations, and the cluster's low <[La/Eu]>=-0.11 dex indicates significant pollution with r-process material. We confirm that both HBs contain cluster members, but metallicity and light-element variations are largely ruled out as sources for the luminosity difference. However, He mass fraction differences as small as {Delta}Y~0.02 cannot be ruled out and may be sufficient to reproduce the double HB.2018AJ....155...71Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/71CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/202 : Globular Clusters in the Milky Way (Harris, 1997)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)II/337 : VISTA Variables in the Via Lactea Survey DR1 (Saito+, 2012)II/348 : VISTA Variable in the Via Lactea Survey DR2 (Minniti+, 2017)J/MNRAS/361/272 : JHKs photometry of 4 Bulge globular clustersJ/AJ/133/1287 : JHK photometry of 24 Galactic globular clustersJ/A+A/486/177 : Bulge field stars from FLAMES-GIRAFFE spectraJ/MNRAS/383/183 : CaII triplet of RGB from VLT/FLAMES obs. (Battaglia+, 2008)J/A+A/517/A81 : 2nd and 3d parameters of HB of globular clustersJ/MNRAS/402/1729 : JHK photometry of 36 Galactic globular clustersJ/A+A/540/A27 : Spectroscopy in Galactic globular clusters (Saviane+, 2012)J/A+A/563/A76 : CaII triplet equivalent widths in 30 globularsJ/A+A/590/A9 : RGB stars in Galactic GC stellar parameters (Dias+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/71https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/71http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/71https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/71https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/71http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/71GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/71/table2 (M2FS Star Identifiers, Coordinates, Photometry, and Velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/71/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/71/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/71/table2?GETtext/xml+votable180.050000true273.249915-31.90070.005555555555555556Cone search capability for table J/AJ/155/71/table3 (FLAMES Star Identifiers, Coordinates, Photometry, and Velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/71/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/71/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/71/table3?GETtext/xml+votable180.050000true273.29745694-31.803563890.0055555555555555566/28768 287697.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/71?format=asciiInfrareddefaultJ/AJ/155/71/table2M2FS Star Identifiers, Coordinates, Photometry, and VelocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMemberMember typemeta.notechar2MASS2MASS catalog identifier (HHMMSSss+DDMMSSs)meta.id;meta.maincharf_2MASS[a] Flag on 2MASS (1)meta.codecharRAdeg2M? 2MASS Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainnullableDEdeg2M? 2MASS Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainnullableJmag2M[9.465/15.548]? 2MASS J band magnitudemagphot.mag;em.IR.JfloatnullableKsmag2M[8.027/14.865]? 2MASS K_s_ band magnitudemagphot.mag;em.IR.KfloatnullableVVVVVV catalog identifier (JHHMMSS.ss+DDMMSS.ss)meta.idcharf_VVV[a] Flag on VVV (1)meta.codecharRAdegV? VVV Right Ascension in decimal degrees (J2000)degpos.eq.ranullableDEdegV? VVV Declination in decimal degrees (J2000)degpos.eq.decnullableJmagV[9.463/17.897]? VVV J band magnitudemagphot.mag;em.IR.JfloatnullableKsmagV[8.23/17.406]? VVV K_s_ band magnitudemagphot.mag;em.IR.KfloatnullableHRV[-378.8/255.3] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[0/6.1] Error in HRVkm/sstat.errorfloatJ/AJ/155/71/table3FLAMES Star Identifiers, Coordinates, Photometry, and VelocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMemberMember typemeta.notechar2MASS2MASS catalog identifier (HHMMSSss+DDMMSSs)meta.id;meta.maincharf_2MASS[a] Flag on 2MASS (1)meta.codecharRAdeg2M? 2MASS Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainnullableDEdeg2M? 2MASS Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainnullableJmag2M[9.465/15.548]? 2MASS J band magnitudemagphot.mag;em.IR.JfloatnullableKsmag2M[8.027/14.865]? 2MASS K_s_ band magnitudemagphot.mag;em.IR.KfloatnullableVVVVVV catalog identifier (JHHMMSS.ss+DDMMSS.ss)meta.idcharf_VVV[a] Flag on VVV (1)meta.codecharRAdegV? VVV Right Ascension in decimal degrees (J2000)degpos.eq.ranullableDEdegV? VVV Declination in decimal degrees (J2000)degpos.eq.decnullableJmagV[9.463/17.897]? VVV J band magnitudemagphot.mag;em.IR.JfloatnullableKsmagV[8.23/17.406]? VVV K_s_ band magnitudemagphot.mag;em.IR.KfloatnullableVLTVLT star name (only in Table 3)meta.idcharRAdegVL? VLT Right Ascension in decimal degrees (J2000) (only in Table 3)degpos.eq.ranullableDEdegVL? VLT Declination in decimal degrees (J2000) (only in Table 3)degpos.eq.decnullableHRV[-378.8/255.3] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[0/6.1] Error in HRVkm/sstat.errorfloatJ/AJ/155/71/table7FLAMES RGB and HB Calcium Triplet Metallicity Data for Cluster MembersVLTVLT star namemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS catalog identifier (HHMMSSss+DDMMSSs)meta.id;meta.maincharVVVVVV catalog identifier (JHHMMSS.ss+DDMMSS.ss)meta.idcharEW(8542)[2.67/4.34]? Ca II 8542{AA} equivalent width ({AA})0.1nmspect.line.eqWidthfloatnullableEW(8662)[2.07/3.32]? Ca II 8662{AA} equivalent width ({AA})0.1nmspect.line.eqWidthfloatnullableSigmaEW[4.86/7.55]? Summed Ca II equivalent width {Sigma}EW ({AA}) (1)0.1nmspect.line.eqWidthfloatnullableW'[4.47/5.4]? Reduced equivalent width ({AA}) (1)0.1nmspect.line.eqWidthfloatnullable[Fe/H][-1.19/-0.5]? Metallicitylog(Sun)phys.abund.Zfloatnullablee_[Fe/H][0.01/0.56]? Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.FefloatnullableJ/AJ/155/71/M2FSM2FS RGB Cluster Member Model Atmosphere Parameters (table 4) , Abundance Ratios and Uncertainties: Oxygen to Calcium (table 5) and Chromium to Europium (table 6)2MASS2MASS catalog identifier (HHMMSSss+DDMMSSs)meta.id;meta.maincharksi[1.65/2.1] Microturbulence velocity {ksi}_mic_km/sphys.veloc.microTurbfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVVVVVV catalog identifier (JHHMMSS.ss+DDMMSS.ss)meta.idcharTeff[4075/4525] Effective temperatureKphys.temperature.effectiveintlogg[0.75/1.75] Surface gravity (in cgs units)log(cm.s**-2)phys.gravityfloat[Fe/H][-0.96/-0.75] Metallicity (in dex)phys.abund.Zfloat[O/Fe][0.02/0.83]? [O/Fe] abundance (in dex)phys.abundfloatnullablee_[O/Fe][0.1]? Uncertainty in [O/Fe] (in dex)stat.error;phys.abundfloatnullable[Na/Fe][-0.14/0.63] [Na/Fe] abundance (in dex)phys.abundfloate_[Na/Fe][0.05/0.11]? Uncertainty in [Na/Fe] (in dex)stat.error;phys.abundfloatnullable[Mg/Fe][0.31/0.59] [Mg/Fe] abundance (in dex)phys.abundfloate_[Mg/Fe][0.05/0.07]? Uncertainty in [Mg/Fe] (in dex)stat.error;phys.abundfloatnullable[Al/Fe][0.31/0.91] [Al/Fe] abundance (in dex)phys.abundfloate_[Al/Fe][0.07/0.14]? Uncertainty in [Al/Fe] (in dex)stat.error;phys.abundfloatnullable[Si/Fe][0.15/0.48] [Si/Fe] abundance (in dex)phys.abundfloate_[Si/Fe][0.07/0.14]? Uncertainty in [Si/Fe] (in dex)stat.error;phys.abundfloatnullable[Ca/Fe][0.07/0.42] [Ca/Fe] abundance (in dex)phys.abundfloate_[Ca/Fe][0.05/0.07]? Uncertainty in [Ca/Fe] (in dex)stat.error;phys.abundfloatnullable[Cr/Fe][-0.27/0.3]? [Cr/Fe] abundance (in dex)phys.abundfloatnullablee_[Cr/Fe][0.07/0.11]? Uncertainty in [Cr/Fe] (in dex)stat.error;phys.abundfloatnullable[FeI/H][-0.97/-0.75] [FeI/H] abundance (in dex)phys.abundfloate_[FeI/H][0.1/0.1] Uncertainty in [FeI/H] (in dex)stat.error;phys.abundfloat[FeII/H][-0.95/-0.75] [FeII/H] abundance (in dex)phys.abundfloate_[FeII/H][0.11/0.13] Uncertainty in [FeII/H] (in dex)stat.error;phys.abundfloat[Ni/Fe][-0.2/0] [Ni/Fe] abundance (in dex)phys.abundfloate_[Ni/Fe][0.05/0.1] Uncertainty in [Ni/Fe] (in dex)stat.error;phys.abundfloat[LaII/Fe][0.18/0.68] [LaII/Fe] abundance (in dex)phys.abundfloate_[LaII/Fe][0.1/0.12] Uncertainty in [LaII/Fe] (in dex)stat.error;phys.abundfloat[EuII/Fe][0.37/0.88]? [EuII/Fe] abundance (in dex)phys.abundfloatnullablee_[EuII/Fe][0.09/0.12]? Uncertainty in [EuII/Fe] (in dex)stat.error;phys.abundfloatnullable