J/MNRAS/460/884ivo://CDS.VizieR/J/MNRAS/460/884doi:10.26093/cds/vizier.74600884CDSHowes L.M.Asplund M.Keller S.C.Casey A.R.Yong D.Lind K.,Frebel A.Hays A.Alves-Brito A.Bessell M.S.Casagrande L.,Marino A.F.Nataf D.M.Owen C.I.Da Costa G.S.Schmidt B.P.,Tisserand P.2024-08-16T20:17:37Z2017-11-10T13:18:26ZCDS support team

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

cds-question@unistra.frmilky-way-galaxypopulation-ii-starschemical-abundancesCosmological models predict the oldest stars in the Galaxy should be found closest to the centre of the potential well, in the bulge. The Extremely Metal-poor BuLge stars with AAOmega survey (EMBLA) successfully searched for these old, metal-poor stars by making use of the distinctive SkyMapper photometric filters to discover candidate metal-poor stars in the bulge. Their metal-poor nature was then confirmed using the AAOmega spectrograph on the Anglo-Australian Telescope. Here we present an abundance analysis of 10 bulge stars with -2.8<[Fe/H]<-1.7 from MIKE/Magellan observations, in total determining the abundances of 22 elements. Combining these results with our previous high-resolution data taken as part of the Gaia-ESO Survey, we have started to put together a picture of the chemical and kinematic nature of the most metal-poor stars in the bulge. The currently available kinematic data are consistent with the stars belonging to the bulge, although more accurate measurements are needed to constrain the stars' orbits. The chemistry of these bulge stars deviates from that found in halo stars of the same metallicity. Two notable differences are the absence of carbon-enhanced metal-poor bulge stars, and the {alpha} element abundances exhibit a large intrinsic scatter and include stars which are underabundant in these typically enhanced elements.2016MNRAS.460..884Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/460/884CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/460/884https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/460/884http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/460/884https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/460/884https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/460/884http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/460/884GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/460/884/stars (Stellar parameters for the 10 bulge stars and the four stars originally published in Howes et al. (2014MNRAS.445.4241H) (tables 1, 4, 5 and 6 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/460/884/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/460/884/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/460/884/stars?GETtext/xml+votable180.050000true276.6563-34.4940.0055555555555555566/28737-28738 28740 28938 42325 42327 47854-47855https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/460/884?format=asciidefaultJ/MNRAS/460/884/starsStellar parameters for the 10 bulge stars and the four stars originally published in Howes et al. (2014MNRAS.445.4241H) (tables 1, 4, 5 and 6 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAbundDisplay the aundancesmeta.ref.urlcharEWDisplay the equivalent widhts for bugle starsmeta.ref.urlcharFlag[BH] B for bulge stars, H for Howes et al. (2014MNRAS.445.4241H) starsmeta.code.errorcharSMSSSMSS star designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharGLON[] Galactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latObs.DateObservation date (only for bulge stars)time.epoch;obsnullableTexp? Exposure time (only for bulge stars)stime.duration;obs.exposureintnullablelambda1? Wavelength range (only for bulge stars)nmem.wlintnullablelambda2? Wavelength range (only for bulge stars)nmem.wlintnullableSlit? Slit width (only for bulge stars)arcsecspect.line.widthfloatnullableS/N450? Signal-to-noise per pixel at 450nm (only for bulge stars)pixel**-1stat.snrintnullableS/Ntot? Median S/N per pixel calculated across total wavelength range (only for H stars)pixel**-1stat.snrintnullableVGCGalactocentric velocity (1)km/sphys.veloc;pos.galactocentricfloatDistHeliocentric distance (this paper)kpcpos.distancefloate_Distrms uncertainty on Dist (this paper)kpcstat.errorfloatTeffEffective temperature (this paper)Kphys.temperature.effectiveinte_Teffrms uncertainty on Teff (this paper)Kstat.error;phys.temperature.effectiveintloggSurface gravity (this paper)log(cm.s**-2)phys.gravityfloate_loggrms uncertainty on logg (this paper)log(cm.s**-2)stat.errorfloat[Fe/H]Metallicity (this paper)phys.abund.Zfloate_[Fe/H]rms uncertainty on [Fe/H] (this paper)stat.error;phys.abund.FefloatvtMicroturbulent velocity (this paper)km/sphys.velocfloate_vtrms uncertainty on vt (this paper)km/sstat.errorfloatDistG? Heliocentric distance from Gaia-ESO (only for H stars)kpcpos.distance;pos.heliocentricfloatnullablee_DistG? rms uncertainty on Dist from Gaia-ESO (only for H stars)kpcstat.errorfloatnullableTeffG? Effective temperature from Gaia-ESO (only for H stars)Kphys.temperature.effectiveintnullablee_TeffG? rms uncertainty on Teff from Gaia-ESO (only for H stars)Kstat.errorintnullableloggG? Surface gravity from Gaia-ESO (only for H stars)log(cm.s**-2)phys.gravityfloatnullablee_loggG? rms uncertainty on logg from Gaia-ESO (only for H stars)log(cm.s**-2)stat.errorfloatnullable[Fe/H]G? Metallicity from Gaia-ESO (only for H stars)phys.abund.Zfloatnullablee_[Fe/H]G? rms uncertainty on [Fe/H] from Gaia-ESO (only for H stars)stat.error;phys.abund.FefloatnullablevtG? Microturbulent velocity from Gaia-ESO (only for H stars)km/sphys.velocfloatnullablee_vtG? rms uncertainty on vt from Gaia-ESO (only for H stars)km/sstat.errorfloatnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/MNRAS/460/884/table7Chemical abundances for all 14 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSMSSSMSS star designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.mainchar[C/Fe]? Abundance [C/Fe]phys.abundfloatnullablee_[C/Fe]? rms uncertainty on [C/Fe]stat.error;phys.abundfloatnullable[O/Fe]? Abundance [O/Fe]phys.abundfloatnullablee_[O/Fe]? rms uncertainty on [O/Fe]stat.error;phys.abundfloatnullable[Na/Fe]? Abundance [Na/Fe]phys.abundfloatnullablee_[Na/Fe]? rms uncertainty on [Na/Fe]stat.error;phys.abundfloatnullable[Mg/Fe]Abundance [Mg/Fe]phys.abundfloate_[Mg/Fe]rms uncertainty on [Mg/Fe]stat.error;phys.abundfloat[Al/Fe]? Abundance [Al/Fe]phys.abundfloatnullablee_[Al/Fe]? rms uncertainty on [Al/Fe]stat.error;phys.abundfloatnullable[Si/Fe]? Abundance [Si/Fe]phys.abundfloatnullablee_[Si/Fe]? rms uncertainty on [Si/Fe]stat.error;phys.abundfloatnullable[K/Fe]? Abundance [K/Fe]phys.abundfloatnullablee_[K/Fe]? rms uncertainty on [K/Fe]stat.error;phys.abundfloatnullable[Ca/Fe]Abundance [Ca/Fe]phys.abundfloate_[Ca/Fe]rms uncertainty on [Ca/Fe]stat.error;phys.abundfloat[Sc/Fe]? Abundance [Sc/Fe]phys.abundfloatnullablee_[Sc/Fe]? rms uncertainty on [Sc/Fe]stat.error;phys.abundfloatnullable[Ti/Fe]Abundance [Ti/Fe]phys.abundfloate_[Ti/Fe]rms uncertainty on [Ti/Fe]stat.error;phys.abundfloat[Cr/Fe]? Abundance [Cr/Fe]phys.abundfloatnullablee_[Cr/Fe]? rms uncertainty on [Cr/Fe]stat.error;phys.abundfloatnullable[Mn/Fe]? Abundance [Mn/Fe]phys.abundfloatnullablee_[Mn/Fe]? rms uncertainty on [Mn/Fe]stat.error;phys.abundfloatnullable[Co/Fe]? Abundance [Co/Fe]phys.abundfloatnullablee_[Co/Fe]? rms uncertainty on [Co/Fe]stat.error;phys.abundfloatnullable[Ni/Fe]Abundance [Ni/Fe]phys.abundfloate_[Ni/Fe]rms uncertainty on [Ni/Fe]stat.error;phys.abundfloat[Zn/Fe]? Abundance [Zn/Fe]phys.abundfloatnullablee_[Zn/Fe]? rms uncertainty on [Zn/Fe]stat.error;phys.abundfloatnullable[Sr/Fe]? Abundance [Sr/Fe]phys.abundfloatnullablee_[Sr/Fe]? rms uncertainty on [Sr/Fe]stat.error;phys.abundfloatnullable[Y/Fe]? Abundance [Y/Fe]phys.abundfloatnullablee_[Y/Fe]? rms uncertainty on [Y/Fe]stat.error;phys.abundfloatnullable[Zr/Fe]? Abundance [Zr/Fe]phys.abundfloatnullablee_[Zr/Fe]? rms uncertainty on [Zr/Fe]stat.error;phys.abundfloatnullable[Ba/Fe]Abundance [Ba/Fe]phys.abundfloate_[Ba/Fe]rms uncertainty on [Ba/Fe]stat.error;phys.abundfloat[La/Fe]? Abundance [La/Fe]phys.abundfloatnullablee_[La/Fe]? rms uncertainty on [La/Fe]stat.error;phys.abundfloatnullable[Eu/Fe]? Abundance [Eu/Fe]phys.abundfloatnullablee_[Eu/Fe]? rms uncertainty on [Eu/Fe]stat.error;phys.abundfloatnullableJ/MNRAS/460/884/table2Atomic dataIonIonphys.atmol.ionStagecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelengthnmem.wldoubleEPExcitation potentialeVphys.atmol.excitationfloatloggfOscillator strengthphys.atmol.oscStrengthfloatRefReference, in refs.dat filemeta.ref;pos.frame;meta.filecharJ/MNRAS/460/884/table3*The measured equivalent widths of the 10 stars for each spectral linerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonIonphys.atmol.ionStagecharlambdaWavelengthnmem.wldoubleEW1? J182637.10-342924.2 equivalent width0.1pmspect.line.widthfloatnullableEW2? J182600.09-332531.0 equivalent width0.1pmspect.line.widthfloatnullableEW3? J182601.24-332358.3 equivalent width0.1pmspect.line.widthfloatnullableEW4? J182753.81-334607.7 equivalent width0.1pmspect.line.widthfloatnullableEW5? J183000.36-333919.3 equivalent width0.1pmspect.line.widthfloatnullableEW6? J182922.48-335559.4 equivalent width0.1pmspect.line.widthfloatnullableEW7? J182930.47-335958.3 equivalent width0.1pmspect.line.widthfloatnullableEW8? J183225.29-334938.4 equivalent width0.1pmspect.line.widthfloatnullableEW9? J183128.71-341018.4 equivalent width0.1pmspect.line.widthfloatnullableEW10? J182948.48-341053.9 equivalent width0.1pmspect.line.widthfloatnullableJ/MNRAS/460/884/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar