Elemental abundances of solar sibling candidates
Article
Article Title | Elemental abundances of solar sibling candidates |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Ramirez, I. (Author), Bajkova, A. T. (Author), Bobylev, V. V. (Author), Roederer, I. U. (Author), Lambert, D. L. (Author), Endl, M. (Author), Cochran, W. D. (Author), MacQueen, P. J. (Author) and Wittenmyer, R. A. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 787 (2) |
Article Number | 154 |
Number of Pages | 17 |
Year | 2014 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/787/2/154 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0004-637X/787/2/154 |
Abstract | Dynamical 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. |
Keywords | stars; abundances; fundamental parameters; individual stars; HD 162826; kinematics and dynamics |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of Texas, United States |
Pulkovo Observatory, Russia | |
University of Michigan, United States | |
University of Texas at Austin, United States | |
University of New South Wales | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q41v0/elemental-abundances-of-solar-sibling-candidates
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