Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/26849
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Mucciarelli, A. | en_US |
dc.contributor.author | Merle, T. | en_US |
dc.contributor.author | BELLAZZINI, Michele | en_US |
dc.date.accessioned | 2020-08-26T15:22:22Z | - |
dc.date.available | 2020-08-26T15:22:22Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/26849 | - |
dc.description.abstract | We derived potassium abundances in red-giant-branch stars in the Galactic globular clusters NGC 104 (144 stars), NGC 6752 (134 stars), and NGC 6809 (151 stars) using high-resolution spectra collected with FLAMES at the ESO - Very Large Telescope. In the samples we consider, we do not find significant intrinsic spreads in [K/Fe], which confirms the previous findings, but which is at variance with the cases of the massive clusters NGC 2419 and NGC 2808. Additionally, marginally significant [K/Fe]-[O/Fe] anti-correlations are found in NGC 104 and NGC 6809, and [K/Fe]-[Na/Fe] correlations are found in NGC 104 and NGC 6752. No evidence of [K/Fe]-[Mg/Fe] anti-correlation are found. The results of our analysis are consistent with a scenario in which the process leading to the multi-populations in globular clusters also implies enrichment in the K abundance, the amplitude of the associated [K/Fe] enhancement becoming measurable only in stars showing the most extreme effects of O and Mg depletion. Stars enhanced in [K/Fe] have so far only been found in clusters harbouring some Mg-poor stars, while the other globulars, without a Mg-poor sub-population, show small or null [K/Fe] spreads. <P />Full Table 1 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/600/A104">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/600/A104</A> | en_US |
dc.language.iso | eng | en_US |
dc.title | The potassium abundance in the globular clusters NGC 104, NGC 6752 and NGC 6809 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201730410 | en_US |
dc.identifier.scopus | 2-s2.0-85017110204 | en_US |
dc.identifier.isi | 000400754000147 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2017/04/aa30410-17/aa30410-17.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 600 | en_US |
dc.relation.firstpage | A104 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 3 | en_US |
dc.description.international | sì | 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 | 2017A&A...600A.104M | 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.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0001-8200-810X | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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aa30410-17.pdf | pdf editoriale | 667.36 kB | Adobe PDF | View/Open |
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