J/ApJS/220/13ivo://CDS.VizieR/J/ApJS/220/13doi:10.26093/cds/vizier.22200013CDSLawler J.E.Sneden C.Cowan J.J.2017-01-23T22:00:00Z2015-12-04T15:21:10ZCDS support team

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

cds-question@unistra.fratomic-physicsNew emission branching fraction measurements for 898 lines of the first spectrum of cobalt (Co I) are determined from hollow cathode lamp spectra recorded with the National Solar Observatory 1m Fourier transform spectrometer on Kitt Peak, AZ and a high-resolution echelle spectrometer. Published radiative lifetimes from laser induced fluorescence measurements are combined with the branching fractions to determine accurate absolute atomic transition probabilities for the 898 lines. Hyperfine structure (hfs) constants for levels of neutral Co in the literature are surveyed and selected values are used to generate complete hfs component patterns for 195 transitions of Co I. These new laboratory data are applied to determine the Co abundance in the Sun and metal-poor star HD 84937, yielding log{epsilon}(Co)=4.955+/-0.007 ({sigma}=0.059) based on 82 Co I lines and log{epsilon}(Co)=2.785+/-0.008 ({sigma}=0.065) based on 66 Co I lines, respectively. A Saha or ionization balance test on the photosphere of HD 84937 is performed using 16 UV lines of Co II, and good agreement is found with the Co I result in this metal-poor ([FeI/H]=-2.32, [FeII/H]=-2.32) dwarf star. The resulting value of [Co/Fe]=+0.14 supports a rise of Co/Fe at low metallicity that has been suggested in other studies.2015ApJS..220...13Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/220/13CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/215/23 : FeI lifetime & branching fractions (Den Hartog+, 2014)J/ApJS/215/20 : Vanadium log(gf) and transition probabilities (Lawler+, 2014)J/ApJS/214/18 : VII log(gf) values, and V abundance in HD 84937 (Wood+ 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/ApJS/211/20 : NiI transition probability measurements (Wood+, 2014)J/ApJS/208/27 : Sun and HD 84937 TiII log(gf) and abundances (Wood+, 2013)J/ApJS/194/35 : Atomic transition probabilities of Mn (Den Hartog+, 2011)J/AJ/141/175 : Abundances in M15 RGB/RHB stars (Sobeck+, 2011)J/ApJ/667/1267 : CrI transition probabilities (Sobeck+, 2007)J/A+A/404/187 : Equivalent widths for metal-poor stars (Gratton+, 2003)J/AJ/120/1841 : Abundances & Kinematics of Halo & Disk Stars (Fulbright 2000)J/A+AS/130/541 : Co II oscillator strengths (Raassen+ 1998)J/A+AS/129/147 : Co II radiative transition probabilities (Quinet 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/220/13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/220/13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/220/13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/220/13https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/220/13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/220/13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJS/220/13/table3Experimental atomic transition probabilities for 898 lines of Co I organized by increasing wavelength in airrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlamAir[2073.2/10382.4] Wavelength in air; in {AA} (1)0.1nmem.wl;phys.atmol.transitiondoubleLev1[28345.8/53822] Upper level (2)cm**-1phys.energy;phys.atmol.leveldoubleP1Upper level parity (2)phys.atmol.parity;phys.atmol.levelcharJ1[0.5/7.5] Upper level J value (2)stat.value;phys.atmol.levelfloatLev0[0/28470.5] Lower level (2)cm**-1phys.energy;phys.atmol.leveldoubleP0Lower level parity (2)phys.atmol.parity;phys.atmol.levelcharJ0[0.5/6.5] Lower level J value (2)stat.value;phys.atmol.levelfloatA[0.001/494] Transition probability1e+06s**-1phys.atmol.transProbdoublee_A[0.0001/49] Total uncertainty in A1e+06s**-1stat.errordoublelog(gf)[-4.7/0.8] Log of degeneracy times oscillator strengthphys.atmol.oscStrengthfloatJ/ApJS/220/13/table7*Hyperfine structure line component patterns for 195 transitions of ^59^Co IrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintsig[9951/43555.2] Center-of-Gravity Wavenumbercm**-1phys.energy;phys.atmol.transitiondoublelamAir[2295.2/10046.5] Center-of-Gravity Air Wavelength in Angstroms0.1nmem.wl;phys.atmol.transitiondoubleF1[0/10] Component upper level F or total angular momentumphys.atmol.qnintF0[0/9] Component lower level F or total angular momentumphys.atmol.qnintdsig[-0.5/0.5] Component offset Wavenumber (1)cm**-1stat.fit.omc;phys.energydoubledlam[-0.15/0.2] Component offset Wavelength; in {AA} (1)0.1nmem.wl;arith.diffdoubleStr[0/0.4] Component strength (2)spect.line.widthdouble