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The solar siblings in the Gaia era

Published online by Cambridge University Press:  17 July 2015

C.A. Martínez-Barbosa ,
A.G.A. Brown  and
S. Portegies Zwart
C.A. Martínez-Barbosa*
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513 Leiden, 2300 RA, The Netherlands
A.G.A. Brown
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513 Leiden, 2300 RA, The Netherlands
S. Portegies Zwart
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513 Leiden, 2300 RA, The Netherlands
*
e-mail: cmartinez@strw.leidenuniv.nl
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Abstract

We perform realistic simulations of the Sun's birth cluster in order to predict the current distribution of solar siblings in the Galaxy. We study the possibility of finding the solar siblings in the Gaia catalogue by using only positional and kinematic information. We find that the number of solar siblings predicted to be observed by Gaia will be around 100 in the most optimistic case, and that a phase space only search in the Gaia catalogue will be extremely difficult. It is therefore mandatory to combine the chemical tagging technique with phase space selection criteria in order to have any hope of finding the solar siblings.

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. 123 - 126
Copyright
© EAS, EDP Sciences, 2015

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