J/AJ/148/67ivo://CDS.VizieR/J/AJ/148/67doi:10.26093/cds/vizier.51480067CDSJohnson C.I.Rich R.M.Kobayashi C.Kunder A.Koch A.2024-10-01T20:08:44Z2015-03-03T14:19:21ZCDS support team

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

cds-question@unistra.frmilky-way-galaxygiant-starschemical-abundancesradial-velocityeffective-temperatureWe present radial velocities and chemical abundances of O, Na, Mg, Al, Si, Ca, Cr, Fe, Co, Ni, and Cu for a sample of 156 red giant branch stars in two Galactic bulge fields centered near (l,b)=(+5.25,-3.02) and (0,-12). The (+5.25,-3.02) field also includes observations of the bulge globular cluster NGC 6553. The results are based on high-resolution (R~20000), high signal-to-noise ration (S/N>~70) FLAMES-GIRAFFE spectra obtained through the European Southern Observatory archive. However, we only selected a subset of the original observations that included spectra with both high S/N and that did not show strong TiO absorption bands. This work extends previous analyses of this data set beyond Fe and the {alpha}-elements Mg, Si, Ca, and Ti. While we find reasonable agreement with past work, the data presented here indicate that the bulge may exhibit a different chemical composition than the local thick disk, especially at [Fe/H]>~-0.5. In particular, the bulge [{alpha}/Fe] ratios may remain enhanced to a slightly higher [Fe/H] than the thick disk, and the Fe-peak elements Co, Ni, and Cu appear enhanced compared to the disk. There is also some evidence that the [Na/Fe] (but not [Al/Fe]) trends between the bulge and local disk may be different at low and high metallicity. We also find that the velocity dispersion decreases as a function of increasing [Fe/H] for both fields, and do not detect any significant cold, high-velocity populations. A comparison with chemical enrichment models indicates that a significant fraction of hypernovae may be required to explain the bulge abundance trends, and that initial mass functions that are steep, top-heavy (and do not include strong outflow), or truncated to avoid including contributions from stars >40M_{sun}_ are ruled out, in particular because of disagreement with the Fe-peak abundance data. For most elements, the NGC 6553 stars exhibit abundance trends nearly identical to comparable metallicity bulge field stars. However, the star-to-star scatter and mean [Na/Fe] ratios appear higher in the cluster, perhaps indicating additional self-enrichment.2014AJ....148...67Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/148/67CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996)I/244 : OGLE General Catalog of Stars. I. (Szymanski+ 1996)J/A+A/563/A15 : Metallicity and kinematics in Galactic bar (Babusiaux+, 2014)J/A+A/562/A66 : GIRAFFE Inner Bulge Survey (GIBS). I. (Zoccali+, 2014)J/A+A/549/A147 : Abundances of microlensed Bulge dwarfs. V. (Bensby+, 2013)J/ApJ/765/157 : Abundances of red giants in Galactic bulge (Johnson+, 2013)J/ApJ/749/175 : Abundances for stars in Plaut's window (Johnson+, 2012)J/A+A/546/A57 : Spectroscopy of 400 red giants in Bulge (Uttenthaler+, 2012)J/ApJ/732/108 : Abundances of 92 giants in Plaut's window (Johnson+, 2011)J/A+A/530/A54 : Abundances of 650 bulge red giants (Gonzalez+, 2011)J/A+A/513/A35 : Abundances of Galactic red giants (Alves-Brito+, 2010)J/ApJ/721/L28 : Red clump stars in Galactic Bulge from OGLE-III (Nataf+, 2010)J/ApJ/699/66 : Abundances in two Galactic bulge stars (Cohen+, 2009)J/ApJ/691/1387 : Spectroscopy of the Galactic bar. I. (Rangwala+, 2009)J/ApJ/682/1029 : Abundances in OGLE-2007-BLG-349S (Cohen+, 2008)J/A+A/486/177 : Bulge field stars from FLAMES-GIRAFFE spectra (Zoccali+, 2008)J/A+A/465/799 : Abundances of Galactic Bulge red giants (Lecureur+, 2007)J/ApJ/655/L33 : High-resolution spectrum of OGLE-2006-BLG-265 (Johnson+, 2007)J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)J/AcA/52/217 : OGLE VI photometry of Galactic Bulge (Udalski+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/148/67https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/148/67http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/148/67https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/148/67https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/148/67http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/148/67GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/148/67/stars (Star properties (table1) , abundance ratios (table 3) with their uncertainties (table 4) and their dispersions (table 5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/148/67/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/148/67/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/148/67/stars?GETtext/xml+votable180.050000true272.04270806-25.793166940.0055555555555555566/28882 47852-478538.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/148/67?format=asciidefaultJ/AJ/148/67/starsStar properties (table1) , abundance ratios (table 3) with their uncertainties (table 4) and their dispersions (table 5)[O/Fe]? Log oxygen abundance relative to iron (4)log(Sun)phys.abundfloatnullable[Na/Fe]Log sodium abundance relative to ironlog(Sun)phys.abundfloat[Mg/Fe]? Log magnesium abundance relative to ironlog(Sun)phys.abundfloatnullable[Al/Fe]? Log aluminium abundance relative to ironlog(Sun)phys.abundfloatnullable[Si/Fe]Log silicon abundance relative to ironlog(Sun)phys.abundfloat[Ca/Fe]Log calcium abundance relative to ironlog(Sun)phys.abundfloat[Cr/Fe]? Log chromium abundance relative to ironlog(Sun)phys.abundfloatnullable[FeI/H]Log metallicity derived from FeI lineslog(Sun)phys.abundfloat[FeII/H]? Log metallicity derived from FeII lineslog(Sun)phys.abundfloatnullable[Co/Fe]? Log cobalt abundance relative to ironlog(Sun)phys.abundfloatnullable[Ni/Fe]Log nickel abundance relative to ironlog(Sun)phys.abundfloat[Cu/Fe]? Log copper abundance relative to ironlog(Sun)phys.abundfloatnullabledO? Total uncertainty for [O/Fe] {Delta}[O/Fe] (5)log(Sun)stat.errorfloatnullablesCu? 1{sigma} line-to-line dispersion value for Cu (6)log(Sun)stat.variancefloatnullableZ08Data from Zoccali et al. 2008 (J/A+A/486/177)meta.ref.urlintnullableG11Data from Gonzalez et al. 2011 (J/A+A/530/A54)meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldGalactic bulge field (G1)meta.id;obs.fieldcharOGLEOGLE identification value (G2)meta.id;meta.mainchar2MASS? 2MASS identificationmeta.idcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainV-I[1.097/1.679]? The (V-I) color indexmagphot.color;em.opt.V;em.opt.IfloatnullableJmag[11.71/13.854]? 2MASS J band magnitudemagphot.mag;em.IR.JfloatnullableHmag[10.794/13.357]? 2MASS H band magnitudemagphot.mag;em.IR.HfloatnullableKsmag[10.483/13.339]? 2MASS Ks band magnitudemagphot.mag;em.IR.KfloatnullableTeff[4225/5350] Effective temperatureKphys.temperature.effectiveintlogg[1.35/3.85] Surface gravity (cgs units)log(cm.s**-2)phys.gravityfloat[Fe/H][-1.74/0.48] Metallicity (1)log(Sun)phys.abund.Zfloatvt[0.9/2.2] Microturbulent velocitykm/sphys.velocfloatHRV[-280.09/255.23] Heliocentric radial velocity (2)km/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[0.01/0.71] Error in HRV (3)km/sstat.errorfloatdNaTotal uncertainty for [Na/Fe] {Delta}[Na/Fe] (5)log(Sun)stat.errorfloatdMg? Total uncertainty for [Mg/Fe] {Delta}[Mg/Fe] (5)log(Sun)stat.errorfloatnullabledAl? Total uncertainty for [Al/Fe] {Delta}[Al/Fe] (5)log(Sun)stat.errorfloatnullabledSiTotal uncertainty for [Si/Fe] {Delta}[Si/Fe] (5)log(Sun)stat.errorfloatdCaTotal uncertainty for [Ca/Fe] {Delta}[Ca/Fe] (5)log(Sun)stat.errorfloatdCr? Total uncertainty for [Cr/Fe] {Delta}[Cr/Fe] (5)log(Sun)stat.errorfloatnullabledFeITotal uncertainty for [FeI/H] {Delta}[FeI/H] (5)log(Sun)stat.errorfloatdFeII? Total uncertainty for [FeII/H] {Delta}[FeII/H] (5)log(Sun)stat.errorfloatnullabledCo? Total uncertainty for [Co/Fe] {Delta}[Co/Fe] (5)log(Sun)stat.errorfloatnullabledNiTotal uncertainty for [Ni/Fe] {Delta}[Ni/Fe] (5)log(Sun)stat.errorfloatdCu? Total uncertainty for [Cu/Fe] {Delta}[Cu/Fe] (5)log(Sun)stat.errorfloatnullablesO? 1{sigma} line-to-line dispersion value for O (6)log(Sun)stat.variancefloatnullablesNa? 1{sigma} line-to-line dispersion value for Na (6)log(Sun)stat.variancefloatnullablesMg? 1{sigma} line-to-line dispersion value for Mg (6)log(Sun)stat.variancefloatnullablesAl? 1{sigma} line-to-line dispersion value for Al (6)log(Sun)stat.variancefloatnullablesSi1{sigma} line-to-line dispersion value for Si (6)log(Sun)stat.variancefloatsCa1{sigma} line-to-line dispersion value for Ca (6)log(Sun)stat.variancefloatsCr? 1{sigma} line-to-line dispersion value for Cr (6)log(Sun)stat.variancefloatnullablesFeI1{sigma} line-to-line dispersion value for FeI (6)log(Sun)stat.variancefloatsFeII? FeII 1{sigma} line-to-line dispersion value (6)log(Sun)stat.variancefloatnullablesCo? 1{sigma} line-to-line dispersion value for Co (6)log(Sun)stat.variancefloatnullablesNi1{sigma} line-to-line dispersion value for Ni (6)log(Sun)stat.variancefloatVmag[14.97/16.25]? V-band magnitudemagphot.mag;em.opt.VfloatnullableJ/AJ/148/67/table2Line listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintColName of the column in Table 3 giving the ion abundance (added at CDS)meta.ref.urlcharlambda[5593.73/6864.31] Wavelength {lambda}0.1nmem.wlfloatEP[0/5.87] Excitation potentialeVphys.atmol.excitationfloatloggf[-9.75/-0.17]? Log of the oscillator strengthphys.atmol.oscStrengthfloatnullablen_loggf[hfs] "hfs" indicates the hyperfine structure was taken into account (see Section 3.3 for details)meta.notecharlogEsun[4.04/8.69] Derived solar abundance log{epsilon}(X)_{Sun}_ (1)phys.abundfloatlogEarc[3.71/8.63] Adopted Arcturus abundance log{epsilon}(X)_Arc_ (1)phys.abundfloatAbund[-0.5/0.44] Abundance [X/Fe] or [Fe/H]_Arc_log(Sun)phys.abundfloatIonSpeciesphys.atmol.ionStagechar