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Testing the chemical tagging technique with open clusters

Blanco-Cuaresma, S; Soubiran, C; Heiter, U; Asplund, Martin; Carraro, G; Costado, M.T.; Feltzing, Sofia; González-Hernández, J.I.; Jiménez-Esteban, F; Korn, A. J.; Marino, Anna; Montes, D; San Roman, I; Tabernero, H.M.; Tautvaisiene, G

Description

Context. Stars are born together from giant molecular clouds and, if we assume that the priors were chemically homogeneous and well-mixed, we expect them to share the same chemical composition. Most of the stellar aggregates are disrupted while orbiting the Galaxy and most of the dynamic information is lost, thus the only possibility of reconstructing the stellar formation history is to analyze the chemical abundances that we observe today. Aims. The chemical tagging technique aims to recover...[Show more]

dc.contributor.authorBlanco-Cuaresma, S
dc.contributor.authorSoubiran, C
dc.contributor.authorHeiter, U
dc.contributor.authorAsplund, Martin
dc.contributor.authorCarraro, G
dc.contributor.authorCostado, M.T.
dc.contributor.authorFeltzing, Sofia
dc.contributor.authorGonzález-Hernández, J.I.
dc.contributor.authorJiménez-Esteban, F
dc.contributor.authorKorn, A. J.
dc.contributor.authorMarino, Anna
dc.contributor.authorMontes, D
dc.contributor.authorSan Roman, I
dc.contributor.authorTabernero, H.M.
dc.contributor.authorTautvaisiene, G
dc.date.accessioned2016-06-14T23:18:44Z
dc.identifier.issn0004-6361
dc.identifier.urihttp://hdl.handle.net/1885/102598
dc.description.abstractContext. Stars are born together from giant molecular clouds and, if we assume that the priors were chemically homogeneous and well-mixed, we expect them to share the same chemical composition. Most of the stellar aggregates are disrupted while orbiting the Galaxy and most of the dynamic information is lost, thus the only possibility of reconstructing the stellar formation history is to analyze the chemical abundances that we observe today. Aims. The chemical tagging technique aims to recover disrupted stellar clusters based merely on their chemical composition. We evaluate the viability of this technique to recover co-natal stars that are no longer gravitationally bound. Methods. Open clusters are co-natal aggregates that have managed to survive together. We compiled stellar spectra from 31 old and intermediate-age open clusters, homogeneously derived atmospheric parameters, and 17 abundance species, and applied machine learning algorithms to group the stars based on their chemical composition. This approach allows us to evaluate the viability and efficiency of the chemical tagging technique. Results. We found that stars at different evolutionary stages have distinct chemical patterns that may be due to NLTE effects, atomic diffusion, mixing, and biases. When separating stars into dwarfs and giants, we observed that a few open clusters show distinct chemical signatures while the majority show a high degree of overlap. This limits the recovery of co-natal aggregates by applying the chemical tagging technique. Nevertheless, there is room for improvement if more elements are included and models are improved.
dc.publisherSpringer
dc.rightsAuthor/s retain copyright
dc.sourceAstronomy and Astrophysics
dc.titleTesting the chemical tagging technique with open clusters
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume577
dc.date.issued2015
local.identifier.absfor020100 - ASTRONOMICAL AND SPACE SCIENCES
local.identifier.ariespublicationa383154xPUB2144
local.type.statusPublished Version
local.contributor.affiliationBlanco-Cuaresma, S, Univ. Bordeaux
local.contributor.affiliationSoubiran, C, Univ. Bordeaux
local.contributor.affiliationHeiter, U, Uppsala University,
local.contributor.affiliationAsplund, Martin, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationCarraro, G, ESO
local.contributor.affiliationCostado, M.T., Instituto de Astrofísica de Andalucía-
local.contributor.affiliationFeltzing, Sofia, Lund Observatory
local.contributor.affiliationGonzález-Hernández, J.I., Universidad Complutense de Madrid
local.contributor.affiliationJiménez-Esteban, F, Centro de Astrobiología
local.contributor.affiliationKorn, A. J., Uppsala University
local.contributor.affiliationMarino, Anna, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMontes, D, Universidad Complutense de Madrid
local.contributor.affiliationSan Roman, I, Universidad de Concepcion
local.contributor.affiliationTabernero, H.M., Universidad Complutense de Madrid
local.contributor.affiliationTautvaisiene, G, Vilnius University
local.identifier.doi10.1051/0004-6361/201425232
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-06-14T08:28:58Z
local.identifier.scopusID2-s2.0-84929206771
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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