J/ApJ/737/L32ivo://CDS.VizieR/J/ApJ/737/L32doi:10.26093/cds/vizier.17379032CDSSchuler S.C.Cunha K.Smith V.V.Ghezzi L.King J.R.Deliyannis C.P.,Boesgaard A.M.2013-02-28T09:42:20Z2013-02-12T13:37:00ZCDS support team

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

cds-question@unistra.frchemical-abundancesline-intensitiesmultiple-starsResults of a detailed abundance analysis of the solar twins 16 Cyg A and 16 Cyg B based on high-resolution, high signal-to-noise ratio echelle spectroscopy are presented. 16 Cyg B is known to host a giant planet while no planets have yet been detected around 16 Cyg A. Stellar parameters are derived directly from our high-quality spectra, and the stars are found to be physically similar, with {Delta}T_eff_=+43K, {Delta}logg=-0.02dex, and {Delta}{xi}=+0.10km/s (in the sense of A-B), consistent with previous findings. Abundances of 15 elements are derived and are found to be indistinguishable between the two stars. The abundances of each element differ by <=0.026dex, and the mean difference is +0.003+/-0.015({sigma}) dex. Aside from Li, which has been previously shown to be depleted by a factor of at least 4.5 in 16 Cyg B relative to 16 Cyg A, the two stars appear to be chemically identical. The abundances of each star demonstrate a positive correlation with the condensation temperature of the elements (T_c_); the slopes of the trends are also indistinguishable. In accordance with recent suggestions, the positive slopes of the [m/H]-T_c_ relations may imply that terrestrial planets have not formed around either 16 Cyg A or 16 Cyg B.2011ApJ...737L..32Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/737/L32CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AZh/88/530 : Dynamical study of ADS 12815 (Kiselev+, 2011)J/A+A/526/A71 : C abundances in G and K nearby stars (Da Silva+, 2011)J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011)J/MNRAS/414/1227 : Mg/Fe ratio of MILES stars (Milone+, 2011)J/MNRAS/396/1895 : MgI and sTiO index definitions (Cenarro+, 2009)J/A+A/508/L17 : Abundances in solar analogs (Ramirez+, 2009)J/AZh/84/997 : Abundances of Sr, Y, Zr, Ce and Ba (Mashonkina+, 2007)J/ApJS/169/430 : Atmospheric parameters of metal-rich stars (Robinson+, 2007)J/PASJ/57/65 : CNO abundances of solar-type stars (Takeda+, 2005)J/PASJ/57/45 : Lithium abundances of F-K stars (Takeda+, 2005)J/AZh/82/453 : Cat. of spectroscopic abundances in stars (Borkova+, 2005)J/A+A/438/139 : Abundances in Milky Way's disk (Soubiran+, 2005)J/A+A/423/683 : Sodium abundances in nearby disk stars (Shi+, 2004)J/AZh/81/541 : Abundances of 15 solar analogues (Galeev+, 2004)J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)J/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)J/PASP/113/1365 : Super-metal-rich stars (Buzzoni+, 2001)J/A+AS/137/521 : 8500-8750{AA} high resolution spectroscopy (Munari+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/737/L32https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/737/L32http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/737/L32https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/737/L32https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/737/L32http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/737/L32GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/737/L32/table2Lines measured, equivalent widths, and abundancesIonIonphys.atmol.ionStagecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in Angstroms {lambda}({AA})0.1nmem.wlfloatExPotExcitation potential {chi}eVphys.atmol.excitationfloatlog(gf)Log of the oscillator strengthphys.atmol.oscStrengthfloatEWSEquivalent width in the solar spectrum (m{AA})0.1pmspect.line.eqWidthfloatlogNSLog of solar number abundancephys.abundfloatEWA? Equivalent width in the 16 Cyg A (m{AA})0.1pmspect.line.eqWidthfloatnullablelogNA? Log of 16 Cyg A number abundancephys.abundfloatnullableEWB? Equivalent width in the 16 Cyg B (m{AA})0.1pmspect.line.eqWidth;em.opt.BfloatnullablelogNB? Log of 16 Cyg B number abundancephys.abundfloatnullable