Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28113
DC Field | Value | Language |
---|---|---|
dc.contributor.author | ANNIBALI, FRANCESCA | en_US |
dc.contributor.author | Morandi, E. | en_US |
dc.contributor.author | Watkins, L. L. | en_US |
dc.contributor.author | TOSI, Monica | en_US |
dc.contributor.author | Aloisi, A. | en_US |
dc.contributor.author | BUZZONI, Alberto | en_US |
dc.contributor.author | CUSANO, FELICE | en_US |
dc.contributor.author | FUMANA, Marco | en_US |
dc.contributor.author | Marchetti, A. | en_US |
dc.contributor.author | MIGNOLI, Marco | en_US |
dc.contributor.author | Mucciarelli, A. | en_US |
dc.contributor.author | ROMANO, Donatella | en_US |
dc.contributor.author | van der Marel, R. P. | en_US |
dc.date.accessioned | 2020-11-02T13:40:04Z | - |
dc.date.available | 2020-11-02T13:40:04Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28113 | - |
dc.description.abstract | We present intermediate-resolution (R ∼ 1000) spectra in the ∼3500-10 000 Å range of 14 globular clusters in the Magellanic irregular galaxy NGC 4449 acquired with the Multi-Object Double Spectrograph on the Large Binocular Telescope. We derived Lick indices in the optical and the Ca II triplet index in the near-infrared in order to infer the clusters' stellar population properties. The inferred cluster ages are typically older than ∼9 Gyr, although ages are derived with large uncertainties. The clusters exhibit intermediate metallicities, in the range -1.2 ≲ [Fe/H] ≲ -0.7, and typically sub-solar [α/Fe] ratios, with a peak at ∼-0.4. These properties suggest that (i) during the first few Gyr NGC 4449 formed stars slowly and inefficiently, with galactic winds having possibly contributed to the expulsion of the α-elements, and (ii) globular clusters in NGC 4449 formed relatively `late', from a medium already enriched in the products of Type Ia supernovae. The majority of clusters appear also underabundant in CN compared to Milky Way halo globular clusters, perhaps because of the lack of a conspicuous N-enriched, second generation of stars like that observed in Galactic globular clusters. Using the cluster velocities, we infer the dynamical mass of NGC 4449 inside 2.88 kpc to be M(<2.88 kpc) = 3.15^{+3.16}_{-0.75} × 10^9 M_{\odot }. We also report the serendipitous discovery of a planetary nebula within one of the targeted clusters, a rather rare event. | en_US |
dc.language.iso | eng | en_US |
dc.title | LBT/MODS spectroscopy of globular clusters in the irregular galaxy NGC 4449 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/sty344 | en_US |
dc.identifier.scopus | 2-s2.0-85045585326 | en_US |
dc.identifier.isi | 000430940900037 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/476/2/1942/4848306 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 476 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 1942 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 13 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018MNRAS.476.1942A | 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::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 (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.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | IASF Milano | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0003-3758-4516 | - |
crisitem.author.orcid | 0000-0002-0986-4759 | - |
crisitem.author.orcid | 0000-0002-6514-1870 | - |
crisitem.author.orcid | 0000-0003-2910-6565 | - |
crisitem.author.orcid | 0000-0001-6787-5950 | - |
crisitem.author.orcid | 0000-0002-9087-2835 | - |
crisitem.author.orcid | 0000-0002-0845-6171 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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annibali_2018.pdf | PDF editoriale | 11.02 MB | Adobe PDF | View/Open |
28113-annibali_2018_P01.pdf | Miur | 9.61 MB | Adobe PDF | |
28113-annibali_2018_P02.pdf | Miur | 1.48 MB | Adobe PDF |
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