Re-grouping stars based on the chemical tagging technique: A case study of M67 and IC4651

S. Blanco-Cuaresma 1 C. Soubiran 2
2 M2A 2016
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
Abstract : 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.
Type de document :
Communication dans un congrès
2016arXiv160909500B - to appear in SF2A-2016: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics – held 4 au 17 juin 2016 Lyon , Jun 2016, Lyon, France. 2016
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01376558
Contributeur : Marie-Paule Pomies <>
Soumis le : mercredi 5 octobre 2016 - 10:50:41
Dernière modification le : jeudi 6 octobre 2016 - 01:05:24

Identifiants

Collections

Citation

S. Blanco-Cuaresma, C. Soubiran. Re-grouping stars based on the chemical tagging technique: A case study of M67 and IC4651. 2016arXiv160909500B - to appear in SF2A-2016: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics – held 4 au 17 juin 2016 Lyon , Jun 2016, Lyon, France. 2016. 〈hal-01376558〉

Partager

Métriques

Consultations de la notice

48