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Do open clusters have distinguishable chemical signatures?

Published online by Cambridge University Press:  17 July 2015

S. Blanco-Cuaresma ,
C. Soubiran  and
U. Heiter
S. Blanco-Cuaresma
Affiliation:
CNRS Univ. Bordeaux, LAB, UMR 5804, 33270 Floirac, France
C. Soubiran
Affiliation:
CNRS Univ. Bordeaux, LAB, UMR 5804, 33270 Floirac, France
U. Heiter
Affiliation:
Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
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Abstract

Past studies have already shown that stars in open clusters are chemically homogeneous (e.g. De Silva et al. 2006, 2007 and 2009). These results support the idea that stars born from the same giant molecular cloud should have the same chemical composition. In this context, the chemical tagging technique was proposed by Freeman et al. (2002). The principle is to recover disrupted stellar clusters by looking only to the stellar chemical composition. In order to evaluate the feasibility of this approach, it is necessary to test if we can distinguish between stars born from different molecular clouds. For this purpose, we studied the chemical composition of stars in 32 old and intermediate-age open clusters, and we applied machine learning algorithms to recover the original cluster by only considering the chemical signatures.

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. 133 - 136
Copyright
© EAS, EDP Sciences, 2015

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