Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24291
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Smiljanic, R. | en_US |
dc.contributor.author | FRANCIOSINI, Elena | en_US |
dc.contributor.author | RANDICH, Maria Sofia | en_US |
dc.contributor.author | MAGRINI, LAURA | en_US |
dc.contributor.author | BRAGAGLIA, Angela | en_US |
dc.contributor.author | Pasquini, L. | en_US |
dc.contributor.author | VALLENARI, Antonella | en_US |
dc.contributor.author | Tautvaišienė, G. | en_US |
dc.contributor.author | BIAZZO, Katia | en_US |
dc.contributor.author | FRASCA, Antonio | en_US |
dc.contributor.author | Donati, P. | en_US |
dc.contributor.author | Delgado Mena, E. | en_US |
dc.contributor.author | Casey, A. R. | en_US |
dc.contributor.author | Geisler, D. | en_US |
dc.contributor.author | Villanova, S. | en_US |
dc.contributor.author | Tang, B. | en_US |
dc.contributor.author | Sousa, S. G. | en_US |
dc.contributor.author | Gilmore, G. | en_US |
dc.contributor.author | Bensby, T. | en_US |
dc.contributor.author | François, P. | en_US |
dc.contributor.author | Koposov, S. E. | en_US |
dc.contributor.author | Lanzafame, Alessandro Carmelo | en_US |
dc.contributor.author | PANCINO, ELENA | en_US |
dc.contributor.author | Recio-Blanco, A. | en_US |
dc.contributor.author | Costado, M. T. | en_US |
dc.contributor.author | Hourihane, A. | en_US |
dc.contributor.author | Lardo, C. | en_US |
dc.contributor.author | de Laverny, P. | en_US |
dc.contributor.author | Lewis, J. | en_US |
dc.contributor.author | Monaco, L. | en_US |
dc.contributor.author | MORBIDELLI, LORENZO | en_US |
dc.contributor.author | SACCO, GIUSEPPE GERMANO | en_US |
dc.contributor.author | Worley, C. C. | en_US |
dc.contributor.author | ZAGGIA, Simone | en_US |
dc.contributor.author | Martell, S. | en_US |
dc.date.accessioned | 2020-04-28T16:19:08Z | - |
dc.date.available | 2020-04-28T16:19:08Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24291 | - |
dc.description.abstract | Aims: We report the discovery of two Li-rich giants, with A(Li) ~ 1.50, in an analysis of a sample of 40 giants of the open cluster Trumpler 20 (with turnoff mass ~1.8 M<SUB>☉</SUB>). The cluster was observed in the context of the Gaia-ESO Survey. <br>Methods: The atmospheric parameters and Li abundances were derived using high-resolution UVES spectra. The Li abundances were corrected for nonlocal thermodynamical equilibrium (non-LTE) effects. <BR> Results: Only upper limits of the Li abundance could be determined for the majority of the sample. Two giants with detected Li turned out to be Li rich: star MG 340 has A(Li)<SUB>non-LTE</SUB> = 1.54 ± 0.21 dex and star MG 591 has A(Li)<SUB>non-LTE</SUB> = 1.60 ± 0.21 dex. Star MG 340 is on average ~0.30 dex more rich in Li than stars of similar temperature, while for star MG 591 this difference is on average ~0.80 dex. Carbon and nitrogen abundances indicate that all stars in the sample have completed the first dredge-up. <BR> Conclusions: The Li abundances in this unique sample of 40 giants in one open cluster clearly show that extra mixing is the norm in this mass range. Giants with Li abundances in agreement with the predictions of standard models are the exception. To explain the two Li-rich giants, we suggest that all events of extra mixing have been inhibited. This includes rotation-induced mixing during the main sequence and the extra mixing at the red giant branch luminosity bump. Such inhibition has been suggested in the literature to occur because of fossil magnetic fields in red giants that are descendants of main-sequence Ap-type stars. <P />Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme 188.B-3002 (The Gaia-ESO Public Spectroscopic Survey). | en_US |
dc.language.iso | eng | en_US |
dc.title | The Gaia-ESO Survey: Inhibited extra mixing in two giants of the open cluster Trumpler 20? | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201628526 | en_US |
dc.identifier.scopus | 2-s2.0-84974824054 | en_US |
dc.identifier.isi | 000379141300071 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2016/07/aa28526-16/aa28526-16.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 591 | en_US |
dc.relation.firstpage | A62 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | GBR | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | DEU | en_US |
dc.contributor.country | ESP | en_US |
dc.contributor.country | AUS | en_US |
dc.contributor.country | CHL | en_US |
dc.contributor.country | LTU | en_US |
dc.contributor.country | POL | en_US |
dc.contributor.country | PRT | en_US |
dc.contributor.country | SWE | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016A&A...591A..62S | en_US |
dc.relation.ercsector | Scienze Fisiche Settori ERC (ERC) di riferimento::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.orcid | 0000-0003-3969-0232 | - |
crisitem.author.orcid | 0000-0003-2438-0899 | - |
crisitem.author.orcid | 0000-0003-4486-6802 | - |
crisitem.author.orcid | 0000-0002-0338-7883 | - |
crisitem.author.orcid | 0000-0003-0014-519X | - |
crisitem.author.orcid | 0000-0002-1892-2180 | - |
crisitem.author.orcid | 0000-0002-0474-0896 | - |
crisitem.author.orcid | 0000-0002-2697-3607 | - |
crisitem.author.orcid | 0000-0003-0788-5879 | - |
crisitem.author.orcid | 0000-0003-0304-9910 | - |
crisitem.author.orcid | 0000-0002-6893-2221 | - |
crisitem.author.orcid | 0000-0001-6081-379X | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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2016_A+A_591_A62.pdf | PDF editoriale | 276.9 kB | Adobe PDF | View/Open |
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