J/ApJ/787/154ivo://CDS.VizieR/J/ApJ/787/154doi:10.26093/cds/vizier.17870154CDSRamirez I.Bajkova A.T.Bobylev V.V.Roederer I.U.Lambert D.L.,Endl M.Cochran W.D.MacQueen P.J.Wittenmyer R.A.2017-09-04T08:03:19Z2017-07-07T12:57:36ZCDS support team

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

cds-question@unistra.frg-starschemical-abundancesspectroscopyDynamical information along with survey data on metallicity and in some cases age have been used recently by some authors to search for candidates of stars that were born in the cluster where the Sun formed. We have acquired high-resolution, high signal-to-noise ratio spectra for 30 of these objects to determine, using detailed elemental abundance analysis, if they could be true solar siblings. Only two of the candidates are found to have solar chemical composition. Updated modeling of the stars' past orbits in a realistic Galactic potential reveals that one of them, HD 162826, satisfies both chemical and dynamical conditions for being a sibling of the Sun. Measurements of rare-element abundances for this star further confirm its solar composition, with the only possible exception of Sm. Analysis of long-term high-precision radial velocity data rules out the presence of hot Jupiters and confirms that this star is not in a binary system. We find that chemical tagging does not necessarily benefit from studying as many elements as possible but instead from identifying and carefully measuring the abundances of those elements that show large star-to-star scatter at a given metallicity. Future searches employing data products from ongoing massive astrometric and spectroscopic surveys can be optimized by acknowledging this fact.2014ApJ...787..154Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/787/154CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/420/183 : Spectroscopic survey in solar neighborhoodJ/A+A/575/A51 : Line list for abundance determination in Sun siblingshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/787/154https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/787/154http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/787/154https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/787/154https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/787/154http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/787/154GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/787/154/table2Iron Line ListrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavelength; Angstroms (1)0.1nmem.wldoubleIDSpecies identifier (2)phys.atmol.ionStagefloatExPotExcitation PotentialeVphys.atmol.excitationfloatlog(gf)Log of the oscillator strengthphys.atmol.oscStrengthfloatJ/ApJ/787/154/table4Line List For Elements Other Than IronrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavelength; Angstroms (1)0.1nmem.wldoubleIDSpecies identifier (2)phys.atmol.ionStagefloatExPotExcitation PotentialeVphys.atmol.excitationfloatlog(gf)Log of the oscillator strengthphys.atmol.oscStrengthfloat