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dc.contributor.authorSpina, Len
dc.contributor.authorRandich, Sen
dc.contributor.authorMagrini, Len
dc.contributor.authorJeffries, RDen
dc.contributor.authorFriel, EDen
dc.contributor.authorSacco, GGen
dc.contributor.authorPancino, Een
dc.contributor.authorBonito, Ren
dc.contributor.authorBravi, Len
dc.contributor.authorFranciosini, Een
dc.contributor.authorKlutsch, Aen
dc.contributor.authorMontes, Den
dc.contributor.authorGilmore, Gerarden
dc.contributor.authorVallenari, Aen
dc.contributor.authorBensby, Ten
dc.contributor.authorBragaglia, Aen
dc.contributor.authorFlaccomio, Een
dc.contributor.authorKoposov, Sergeyen
dc.contributor.authorKorn, AJen
dc.contributor.authorLanzafame, ACen
dc.contributor.authorSmiljanic, Ren
dc.contributor.authorBayo, Aen
dc.contributor.authorCarraro, Gen
dc.contributor.authorCasey, ARen
dc.contributor.authorCostado, MTen
dc.contributor.authorDamiani, Fen
dc.contributor.authorDonati, Pen
dc.contributor.authorFrasca, Aen
dc.contributor.authorHourihane, Annaen
dc.contributor.authorJofré, Pen
dc.contributor.authorLewis, Jen
dc.contributor.authorLind, Ken
dc.contributor.authorMonaco, Len
dc.contributor.authorMorbidelli, Len
dc.contributor.authorPrisinzano, Len
dc.contributor.authorSousa, SGen
dc.contributor.authorWorley, Clareen
dc.contributor.authorZaggia, Sen
dc.date.accessioned2017-05-04T11:43:02Z
dc.date.available2017-05-04T11:43:02Z
dc.date.issued2017-05-04en
dc.identifier.issn0004-6361
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/264025
dc.description.abstractContext. The radial metallicity distribution in the Galactic thin disc represents a crucial constraint for modelling disc formation and evolution. Open star clusters allow us to derive both the radial metallicity distribution and its evolution over time. Aims. In this paper we perform the first investigation of the present-day radial metallicity distribution based on [Fe/H] determinations in late type members of pre-main-sequence clusters. Because of their youth, these clusters are therefore essential for tracing the current interstellar medium metallicity. Methods. We used the products of the $\textit{Gaia}$-ESO Survey analysis of 12 young regions (age < 100 Myr), covering Galactocentric distances from 6.67 to 8.70 kpc. For the first time, we derived the metal content of star forming regions farther than 500 pc from the Sun. Median metallicities were determined through samples of reliable cluster members. For ten clusters the membership analysis is discussed in the present paper, while for other two clusters (i.e. Chamaeleon I and Gamma Velorum) we adopted the members identified in our previous works. Results. All the pre-main-sequence clusters considered in this paper have close-to-solar or slightly sub-solar metallicities. The radial metallicity distribution traced by these clusters is almost flat, with the innermost star forming regions having [Fe/H] values that are 0.10−0.15 dex lower than the majority of the older clusters located at similar Galactocentric radii. Conclusions. This homogeneous study of the present-day radial metallicity distribution in the Galactic thin disc favours models that predict a flattening of the radial gradient over time. On the other hand, the decrease of the average [Fe/H] at young ages is not easily explained by the models. Our results reveal a complex interplay of several processes (e.g. star formation activity, initial mass function, supernova yields, gas flows) that controlled the recent evolution of the Milky Way.
dc.description.sponsorshipBased on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 188.B-3002. These data products have been processed by the Cambridge Astronomy Survey Unit (CASU) at the Institute of Astronomy, University of Cambridge, and by the FLAMES/UVES reduction team at INAF/Osservatorio Astrofisico di Arcetri. These data have been obtained from the $\textit{Gaia}$-ESO Survey Data Archive, prepared and hosted by the Wide Field Astronomy Unit, Institute for Astronomy, University of Edinburgh, which is funded by the UK Science and Technology Facilities Council. This work was partly supported by the European Union FP7 programme through ERC grant number 320360 and by the Leverhulme Trust through grant RPG-2012-541. We acknowledge the support from INAF and Ministero dell’ Istruzione, dell’ Università’ e della Ricerca (MIUR) in the form of the grant “Premiale VLT 2012” and PRIN-2014. The results presented here benefit from discussions held during the $\textit{Gaia}$-ESO workshops and conferences supported by the ESF (European Science Foundation) through the GREAT Research Network Programme. L.S. acknowledges the support from FAPESP (2014/15706-9).
dc.language.isoenen
dc.publisherEDP Sciences
dc.subjectstars: abundancesen
dc.subjectstars: pre-main sequenceen
dc.subjectGalaxy: abundancesen
dc.subjectGalaxy: disken
dc.subjectGalaxy: evolutionen
dc.subjectopen clusters and associations: generalen
dc.titleThe $\textit{Gaia}$-ESO Survey: the present-day radial metallicity distribution of the Galactic disc probed by pre-main-sequence clustersen
dc.typeArticle
prism.numberA70en
prism.publicationDate2017en
prism.publicationNameAstronomy & Astrophysicsen
prism.volume601en
dc.identifier.doi10.17863/CAM.9385
dcterms.dateAccepted2017-02-07en
rioxxterms.versionofrecord10.1051/0004-6361/201630078en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2017-05-04en
dc.contributor.orcidGilmore, Gerard [0000-0003-4632-0213]
dc.contributor.orcidKoposov, Sergey [0000-0003-2644-135X]
dc.contributor.orcidWorley, Clare [0000-0001-9310-2898]
dc.identifier.eissn1432-0746
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Research Council (320360)


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