J/ApJ/732/108ivo://CDS.VizieR/J/ApJ/732/108doi:10.26093/cds/vizier.17320108CDSJohnson C.I.Rich R.M.Fulbright J.P.Valenti E.McWilliam A.2017-06-20T13:16:49Z2012-12-05T14:02:28ZCDS support team

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

cds-question@unistra.frchemical-abundancesgiant-starsmilky-way-galaxyradial-velocityWe present Fe, Si, and Ca abundances for 61 giants in Plaut's window (l=-1{deg}, b=-8.5{deg}) and Fe abundances for an additional 31 giants in a second, nearby field (l=0{deg}, b=-8{deg}) derived from high-resolution (R~25000) spectra obtained with the Blanco 4m telescope and Hydra multifiber spectrograph. The median metallicity of red giant branch (RGB) stars in the Plaut's field is ~0.4dex lower than those in Baade's window, and confirms the presence of an iron abundance gradient along the bulge minor axis. The full metallicity range of our (biased) RGB sample spans -1.5<[Fe/H]<+0.3, which is similar to that found in other bulge fields. We also derive a photometric metallicity distribution function for RGB stars in the (l=-1{deg}, b=-8.5{deg}) field and find very good agreement with the spectroscopic metallicity distribution. The radial velocity (RV) and dispersion data for the bulge RGB stars are in agreement with previous results of the Bulge Radial Velocity Assay survey, and we find evidence for a decreasing velocity dispersion with increasing [Fe/H]. The [{alpha}/Fe] enhancement in Plaut field stars is nearly identical to that observed in Baade's window, and suggests that an [{alpha}/Fe] gradient does not exist between b=-4{deg} and -8{deg}. Additionally, a subset of our sample (23 stars) appears to be foreground red clump stars that are very metal rich, exhibit small metallicity and RV dispersions, and are enhanced in {alpha} elements. While these stars likely belong to the Galactic inner disk population, they exhibit [{alpha}/Fe] ratios that are enhanced above the thin and thick disk.2011ApJ...732..108Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/732/108CatalogResearchIsServedByTAP 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)J/A+A/546/A57 : Structure and formation of the Bulge (Uttenthaler+, 2012)J/A+A/513/A35 : Abundances of Galactic red giants (Alves-Brito+, 2010)J/A+A/512/A41 : Abundances of microlensed stars in the Bulge (Bensby+, 2010)J/ApJ/691/1387 : Spectroscopy of the Galactic bar. I. (Rangwala+, 2009)J/A+A/486/177 : Bulge field stars from FLAMES-GIRAFFE (Zoccali+, 2008)J/A+A/465/799 : Abundances of Galactic Bulge red giants (Lecureur+, 2007)J/AJ/134/1432 : Proper motions in Plaut's window (Vieira+, 2007)J/AJ/131/431 : Abundances of Galactic G dwarfs (Brewer+, 2006)J/ApJ/636/821 : Abundances of Baade's Window K giants (Fulbright+, 2006)J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)J/A+A/433/185 : Abundance analysis of 102 F and G dwarfs (Bensby+, 2005)J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)J/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)J/AJ/120/1841 : Abundances of Halo and Disk Stars (Fulbright 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/732/108https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/732/108http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/732/108https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/732/108https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/732/108http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/732/108GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/732/108/stars (Program star parameters and results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/732/108/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/732/108/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/732/108/stars?GETtext/xml+votable180.050000true274.4388333-33.88986110.0055555555555555566/28738 28744 287458.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/732/108?format=asciiOpticaldefaultJ/ApJ/732/108/starsProgram star parameters and resultsVtTurbulent velocitykm/sphys.veloc.microTurbfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identification (HHMMSSss+DDMMSSs; J2000)meta.id;meta.maincharVmagThe V band magnitude (1m Swope Telescope)magphot.mag;em.opt.VfloatJmag2MASS J band magnitudemagphot.mag;em.IR.JfloatKsmag2MASS Ks band magnitudemagphot.mag;em.IR.KfloatTeffEffective temperatureKphys.temperature.effectiveintlog(g)Log of the surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicitylog(Sun)phys.abund.Zfloat[Si/Fe]? Log of the Si/Fe abundance ratiolog(Sun)phys.abund;arith.ratiofloatnullable[Ca/Fe]? Log of the Ca/Fe abundance ratiolog(Sun)phys.abund;arith.ratiofloatnullableHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintNoteThe RGB/Field information (1)meta.notecharre.FeRandom uncertainty in log Fe number abundancelog(Sun)stat.errorfloatsy.FeSystematic uncertainty in log Fe number abundancelog(Sun)stat.errorfloatre.Si? Random uncertainty in log Si number abundancelog(Sun)stat.errorfloatnullablesy.Si? Systematic uncertainty in log Si number abundancelog(Sun)stat.errorfloatnullablere.Ca? Random uncertainty in log Ca number abundancelog(Sun)stat.errorfloatnullablesy.Ca? Systematic uncertainty in log Ca number abundancelog(Sun)stat.errorfloatnullableSimbadSimbad column added by the CDSmeta.refchar_RAPositions from 2MASS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS names (declination part)degpos.eq.dec;meta.main