J/ApJ/857/2ivo://CDS.VizieR/J/ApJ/857/2doi:10.26093/cds/vizier.18570002CDSRoederer I.U.Barklem P.S.2019-05-06T14:58:14Z2019-03-15T12:19:08ZCDS support team

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

cds-question@unistra.frspectroscopyultraviolet-astronomyvisible-astronomyline-intensitieschemically-peculiar-starsWe present new abundances derived from CuI, CuII, ZnI, and ZnII lines in six warm (5766<=T_eff_<=6427K), metal-poor (-2.50<=[Fe/H]<=-0.95) dwarf and subgiant (3.64<=logg<=4.44) stars. These abundances are derived from archival high-resolution ultraviolet spectra from the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope and ground-based optical spectra from several observatories. Ionized Cu and Zn are the majority species, and abundances derived from CuII and ZnII lines should be largely insensitive to departures from local thermodynamic equilibrium (LTE). We find good agreement between the [Zn/H] ratios derived separately from ZnI and ZnII lines, suggesting that departures from LTE are, at most, minimal (<~0.1dex). We find that the [Cu/H] ratios derived from CuII lines are 0.36+/-0.06dex larger than those derived from CuI lines in the most metal-poor stars ([Fe/H]{<}-1.8), suggesting that LTE underestimates the Cu abundance derived from CuI lines. The deviations decrease in more metal-rich stars. Our results validate previous theoretical non-LTE calculations for both Cu and Zn, supporting earlier conclusions that the enhancement of [Zn/Fe] in metal-poor stars is legitimate, and the deficiency of [Cu/Fe] in metal-poor stars may not be as large as previously thought.2018ApJ...857....2Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/857/2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/237 : Stellar Photometry in Johnson's 11-color system (Ducati, 2002)J/ApJ/855/63 : Yields of Fe & Zn for different types of SNe (Hirai+, 2018)J/A+A/608/A46 : Constraining cosmic scatter (Reggiani+, 2017)J/ApJ/824/L19 : CEMP star BD+44493 equivalent widths (Roederer+, 2016)J/ApJ/821/37 : Abundances of metal-poor star HD 94028 (Roederer+, 2016)J/ApJ/817/53 : Fe-group abundance analysis in HD84937 (Sneden+, 2016)J/A+A/585/A102 : Copper abundances in solar neighborhood stars (Yan+, 2016)J/A+A/580/A23 : Stroemgren-Crawford uvby{beta} photometry (Paunzen, 2015)J/ApJ/807/171 : SkyMapper Survey metal-poor star spectro. (Jacobson+, 2015)J/ApJS/215/23 : FeI radiative lifetimes (Den Hartog+, 2014)J/AJ/148/81 : APASS BVgri photometry of RAVE stars. I. (Munari+, 2014)J/MNRAS/444/392 : Synthetic Stellar Photometry. I. (Casagrande+, 2014)J/MNRAS/441/3127 : FeI oscillator strengths for Gaia-ESO (Ruffoni+, 2014)J/AJ/147/136 : Stars of very low metal abundance. VI. (Roederer+, 2014)J/A+A/562/A71 : Abundances of solar neighbourhood dwarfs (Bensby+, 2014)J/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)J/ApJ/771/67 : Abundances for 97 metal-poor stars. II. (Ishigaki+, 2013)J/ApJ/755/89 : Metallicities of damped Ly{alpha} systems (Rafelski+, 2012)J/ApJ/750/76 : r-process peaks elements in HD 160617 (Roederer+, 2012)J/ApJ/742/54 : CASH project II. 14 EMP stars (Hollek+, 2011)J/AJ/141/175 : Abundances in M15 RGB/RHB stars (Sobeck+, 2011)J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)J/A+A/530/A15 : Abundances of 94 stars (Nissen+, 2011)J/ApJ/724/975 : Abundances of metal-poor stars (Roederer+, 2010J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010)J/ApJS/182/51 : Transitions of rare earth elements (Lawler+, 2009)J/ApJ/681/1524 : Detailed abundances for 28 metal-poor stars (Lai+, 2008)J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)J/A+A/439/129 : HERES II. Spectroscopic analysis (Barklem+, 2005)J/A+A/435/373 : Broadening of Fe II lines by H collisions (Barklem+, 2005)J/A+A/416/1117 : Abundances in the early Galaxy (Cayrel+, 2004)J/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)J/A+AS/142/467 : Broadening of metallic lines by H collisions (Barklem+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/857/2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/857/2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/857/2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/857/2https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/857/2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/857/2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/857/2/table3 (V magnitudes, model atmosphere parameters, and derived iron abundances)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/857/2/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/857/2/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/857/2/table3?GETtext/xml+votable180.050000true47.106618326.33094440.0055555555555555566/798 4376 28336 40716 42331 445423.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/857/2?format=asciiUVOpticaldefaultJ/ApJ/857/2/table3V magnitudes, model atmosphere parameters, and derived iron abundancesNameStar namemeta.id;meta.maincharprimary[FeI/H][-2.6/-0.9] [FeI/H] abundancephys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNobsNumber of observations for this star (link to table 1)meta.numberintnullableNlNumber of EWs for this star (link to table 2)meta.numberintnullableVmag[5.8/8.8] Johnson V-band magnitude (1)magphot.mag;em.opt.VfloatTeff[5766/6427] Effective temperatureKphys.temperature.effectiveinte_Teff[64/93] Teff uncertaintyKstat.error;phys.temperature.effectiveintlogg[3.6/4.5] Log of surface gravitylog(cm.s**-2)phys.gravityfloate_logg[0.1/0.2] logg uncertaintylog(cm.s**-2)stat.errorfloatVt[1.1/1.6] Microturbulent velocitykm/sphys.velocfloate_Vt[0.1] Vt uncertaintykm/sstat.errorfloat[M/H][-2.6/-1] Metallicityphys.abund.Zfloate_[M/H][0.1] [M/H] uncertaintystat.error;phys.abundfloate_[FeI/H][0.04/0.07] [FeI/H] uncertaintystat.error;phys.abundfloat[FeII/H][-2.5/-0.9] [FeII/H] abundancephys.abundfloate_[FeII/H][0.04/0.06] [FeII/H] uncertaintystat.error;phys.abundfloatFe2-Fe1[-0.03/0.09] [FeII/H] - [FeI/H]phys.abundfloate_Fe2-Fe1[0.06/0.1] Fe2-Fe1 uncertaintystat.errorfloatD02Display data from Ducati+, 2002, II/237meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 3"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/857/2/table1Characteristics of archival UV and optical spectraSetUV or Opt. spectrameta.notecharRResolution(s)spect.resolutioncharf_RFlag on R (1)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharInstInstrumentmeta.id;instrcharProgProgram IDmeta.id;obscharf_ProgFlag on Prog (1)meta.codecharDataUV data setsmeta.id;obscharPIPrincipal Investigator's nameobs.observercharS/N[25/550]? Signal to noise ratio at 2100 and 5000{AA} for the UV and optical spectra, respectivelystat.snrintnullableJ/ApJ/857/2/table2Fe lines and equivalent widthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharIonSpecies (FeI or FeII)phys.atmol.ionStagecharlambda[3724.3/7748.3] Wavelength in Angstroms0.1nmem.wlfloatExPot[1.4/4.8] Excitation potential in eVeVphys.atmol.excitationfloatlog(gf)[-4.2/0.4] Log of degeneracy times oscillator strengthphys.atmol.oscStrengthfloatEW[1.5/137.3] Equivalent width in milli Angstroms0.1pmspect.line.eqWidthfloat