BLANCO-CUARESMA, S.; SOUBIRAN, C.

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BLANCO-CUARESMA, S.
Observatoire Astronomique de l'Université de Genève [ObsGE]

SOUBIRAN, C.
M2A 2016

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Communication dans un congrès

Ce document a été publié dans

2016-06-04, Lyon. 2016-09

Résumé en anglais

The chemical tagging technique proposed by Freeman & Bland-Hawthorn (2002) is based on the idea that stars formed from the same molecular cloud should share the same chemical signature. Thus, using only the chemical composition of stars we should be able to re-group the ones that once belonged to the same stellar aggregate. In Blanco-Cuaresma et al. (2015), we tested the technique on open cluster stars using iSpec (Blanco-Cuaresma et al. 2014a), we demonstrated their chemical homogeneity but we found that the 14 studied elements lead to chemical signatures too similar to reliably distinguish stars from different clusters. This represents a challenge to the technique and a new question was open: Could the inclusion of other elements help to better distinguish stars from different aggregates? With an updated and improved version of iSpec, we derived abundances for 28 elements using spectra from HARPS, UVES and NARVAL archives for the open clusters M67 and IC4651, and we found that the chemical signatures of both clusters are very similar.< Réduire

Mots clés en anglais

Astrophysics - Solar and Stellar Astrophysics

Astrophysics - Astrophysics of Galaxies

Astrophysics - Instrumentation and Methods for Astrophysics

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Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804