Elemental Abundances Of Solar Sibling Candidates

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dc.contributor.utaustinauthorBajkova, A. T.en_US
dc.contributor.utaustinauthorLambert, David L.en_US
dc.contributor.utaustinauthorEndl, Michaelen_US
dc.contributor.utaustinauthorCochran, William D.en_US
dc.contributor.utaustinauthorMacQueen, Phillip J.en_US
dc.creatorRamirez, Ivanen_US
dc.creatorBajkova, A. T.en_US
dc.creatorBobylev, V. V.en_US
dc.creatorRoederer, Ian U.en_US
dc.creatorLambert, David L.en_US
dc.creatorEndl, Michaelen_US
dc.creatorCochran, William D.en_US
dc.creatorMacQueen, Phillip J.en_US
dc.creatorWittenmyer, Robert A.en_US
dc.date.accessioned2016-04-28T19:39:45Z
dc.date.available2016-04-28T19:39:45Z
dc.date.issued2014-06en
dc.description.abstractDynamical 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.en_US
dc.description.departmentMcDonald Observatoryen_US
dc.description.sponsorshipNASA's Sagan Fellowship Programen_US
dc.description.sponsorship"Nonstationary Phenomena in Objects of the Universe" Programme of the Presidium of the Russian Academy of Sciencesen_US
dc.description.sponsorship"Multiwavelength Astrophysical Research" from the President of the Russian Federation NSh-16245.2012.2en_US
dc.description.sponsorshipRobert A. Welch Foundation of Houston, Texas F-634en_US
dc.description.sponsorshipNational Science Foundation under grant AST 1313075en_US
dc.description.sponsorshipNational Aeronautics and Space Agency through the Origins of Solar Systems Program NNX07AL70G, NNX09AB30G, NNX10AL60Gen_US
dc.identifierdoi:10.15781/T2BR61
dc.identifier.Filename2014_06_elementalabundances.pdfen_US
dc.identifier.citationRam�rez, I., A. T. Bajkova, V. V. Bobylev, I. U. Roederer, D. L. Lambert, M. Endl, W. D. Cochran, P. J. MacQueen, and R. A. Wittenmyer. "Elemental abundances of solar sibling candidates." The Astrophysical Journal, Vol. 787, No. 2 (Jun., 2014): 154.en_US
dc.identifier.doi10.1088/0004-637x/787/2/154en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35056
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectstars: abundancesen_US
dc.subjectstars: fundamental parametersen_US
dc.subjectstars: generalen_US
dc.subjectstars:en_US
dc.subjectindividual (hd 162826)en_US
dc.subjectstars: kinematics and dynamicsen_US
dc.subjectgeneva-copenhagen surveyen_US
dc.subjectmetal-poor starsen_US
dc.subjectlaboratoryen_US
dc.subjecttransition-probabilitiesen_US
dc.subjectplanet search programen_US
dc.subjectr-process-richen_US
dc.subjectstellaren_US
dc.subjectevolution databaseen_US
dc.subjectopen clustersen_US
dc.subjectbarium starsen_US
dc.subjectg-dwarfen_US
dc.subjectchemicalen_US
dc.subjectevolutionen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleElemental Abundances Of Solar Sibling Candidatesen_US
dc.typeArticleen_US

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