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Quest for the Sun's siblings based on elemental abundances

Published online by Cambridge University Press:  17 July 2015

C. Liu ,
G. Ruchti ,
S. Feltzing  and
C.A. Martínez-Barbosa
C. Liu*
Affiliation:
Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, 22100 Lund, Sweden
G. Ruchti
Affiliation:
Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, 22100 Lund, Sweden
S. Feltzing
Affiliation:
Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, 22100 Lund, Sweden
C.A. Martínez-Barbosa
Affiliation:
Leiden Observatory, University of Leiden, PB. 9513, Leiden 2300 RA, The Netherlands
*
e-mail: cheng@astro.lu.se
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Abstract

We present stellar parameters, stellar ages, and detailed elemental abundances for Na, Mg, Al, Si, Ca, Ti, Cr, Fe, and Ni for 32 solar sibling candidates. Technique of chemical tagging gives us a high probability that four stars might be from the same open cluster. Only one candidate HIP 40317 which has solar metallicity and age could be a solar sibling. We performed simulations of the Sun's birth cluster in analytical Galactic model and found that there is quite low probability to find solar siblings with radial velocity up to Vr = 34.2 km s−1.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 68: The Milky Way Unravelled by Gaia: GREAT Science from the Gaia Data Releases , 2014 , pp. 127 - 131
Copyright
© EAS, EDP Sciences, 2015

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