Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28661
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Caffau, E. | en_US |
dc.contributor.author | Monaco, L. | en_US |
dc.contributor.author | Bonifacio, P. | en_US |
dc.contributor.author | Korotin, S. | en_US |
dc.contributor.author | Andrievsky, S. | en_US |
dc.contributor.author | CRISTALLO, Sergio | en_US |
dc.contributor.author | Spite, M. | en_US |
dc.contributor.author | Spite, F. | en_US |
dc.contributor.author | Sbordone, L. | en_US |
dc.contributor.author | François, P. | en_US |
dc.contributor.author | Cescutti, G. | en_US |
dc.contributor.author | Salvadori, S. | en_US |
dc.date.accessioned | 2020-12-03T15:20:39Z | - |
dc.date.available | 2020-12-03T15:20:39Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28661 | - |
dc.description.abstract | Context. Carbon-enhanced metal-poor (CEMP) stars are common objects in the metal-poor regime. The lower the metallicity we look at, the larger the fraction of CEMP stars with respect to metal-poor stars with no enhancement in carbon. The chemical pattern of CEMP stars is diversified, strongly suggesting a different origin of the C enhancement in the different types of CEMP stars. <BR /> Aims: We selected a CEMP star, SDSS J0222-0313, with a known high carbon abundance and, from a low-resolution analysis, a strong enhancement in neutron-capture elements of the first peak (Sr and Y) and of the second peak (Ba). The peculiarity of this object is a greater overabundance (with respect to iron) of the first s-process peak than the second s-process peak. <BR /> Methods: We analysed a high-resolution spectrum obtained with the Mike spectrograph at the Clay Magellan 6.5 m telescope in order to derive the detailed chemical composition of this star. <BR /> Results: We confirmed the chemical pattern we expected; we derived abundances for a total of 18 elements and significant upper limits. <BR /> Conclusions: We conclude that this star is a carbon-enhanced metal-poor star enriched in elements produced by s-process (CEMP-s), whose enhancement in heavy elements is due to mass transfer from the more evolved companion in its asymptotic giant branch (AGB) phase. The abundances imply that the evolved companion had a low main sequence mass and it suggests that it experienced a proton ingestion episode at the beginning of its AGB phase. <P />Based on observations collected with Mike at the Magellan-II (Clay) telescope at the Las Campanas Observatory under programme CN2018B-5. | en_US |
dc.language.iso | eng | en_US |
dc.title | The CEMP star SDSS J0222-0313: the first evidence of proton ingestion in very low-metallicity AGB stars? | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201935680 | en_US |
dc.identifier.scopus | 2-s2.0-85077731591 | en_US |
dc.identifier.isi | 000479054700008 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2019/08/aa35680-19/aa35680-19.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 628 | en_US |
dc.relation.firstpage | A46 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 12 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | UKR | 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 | 2019A&A...628A..46C | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Abruzzo | - |
crisitem.author.orcid | 0000-0001-9683-9406 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Caffau_2019_A&A_628_46.pdf | Pdf editoriale | 446.99 kB | Adobe PDF | View/Open |
Page view(s)
61
checked on Mar 28, 2024
Download(s)
27
checked on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.