J/ApJ/791/101ivo://CDS.VizieR/J/ApJ/791/101doi:10.26093/cds/vizier.17910101CDSMassari D.Mucciarelli A.Ferraro F.R.Origlia L.Rich R.M.,Lanzoni B.Dalessandro E.Ibata R.Lovisi L.Bellazzini M.Reitzel D.2017-05-22T14:53:59Z2017-04-07T15:40:10ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyglobular-star-clustersmetallicityeffective-temperatureAs part of a study aimed at determining the kinematical and chemical properties of Terzan 5, we present the first characterization of the bulge stars surrounding this puzzling stellar system. We observed 615 targets located well beyond the tidal radius of Terzan 5 and found that their radial velocity distribution is well described by a Gaussian function peaked at <v_rad_> = +21.0+/-4.6 km/s with dispersion {sigma}_v_= 113.0+/-2.7 km/s. This is one of the few high-precision spectroscopic surveys of radial velocities for a large sample of bulge stars in such a low and positive latitude environment (b = +1.7{deg}). We found no evidence of the peak at <v_rad_> ~ +200 km/s found in Nidever et al. (2012ApJ...755L..25N). Strong contamination of many observed spectra by TiO bands prevented us from deriving the iron abundance for the entire spectroscopic sample, introducing a selection bias. The metallicity distribution was finally derived for a subsample of 112 stars in a magnitude range where the effect of the selection bias is negligible. The distribution is quite broad and roughly peaked at solar metallicity ([Fe/H] =~ +0.05 dex) with a similar number of stars in the super-solar and in the sub-solar ranges. The population number ratios in different metallicity ranges agree well with those observed in other low-latitude bulge fields, suggesting (1) the possible presence of a plateau for|b| < 4{deg} in the ratio between stars in the super-solar (0 < [Fe/H] <0.5 dex) and sub-solar (-0.5 < [Fe/H] <0 dex) metallicity ranges; (2) a severe drop in the metal-poor component ([Fe/H] <-0.5) as a function of Galactic latitude.2014ApJ...791..101Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/791/101CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/699/66 : Abundances in two Galactic bulge stars (Cohen+, 2009)J/A+A/534/A91 : Galactic Bulge Valinhos Observatory Catalog (Teixeira+, 2011)J/A+A/580/A121 : CaT/[Fe/H] calibration for Galactic bulge starsJ/A+A/587/A124 : Metal-poor stars towards the Galactic bulge (Koch+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/791/101https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/791/101http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/791/101https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/791/101https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/791/101http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/791/101GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/791/101/table1 (Identification number, coordinates, atmospheric parameters, iron abundances and their uncertainties for the Terzan 5 field stars in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/791/101/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/791/101/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/791/101/table1?GETtext/xml+votable180.050000true267.1829348-24.69234020.0055555555555555566/28899 28905https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/791/101?format=asciidefaultJ/ApJ/791/101/table1Identification number, coordinates, atmospheric parameters, iron abundances and their uncertainties for the Terzan 5 field stars in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar Identifier (NNNNNNN)meta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainTeffEffective temperatureKphys.temperature.effectiveintlog(g)Log surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]The 1{sigma} uncertainty in [Fe/H]stat.error;phys.abund.FefloatDataData set origin (FLAMES, DEIMOS)meta.codechar