Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29097
DC Field | Value | Language |
---|---|---|
dc.contributor.author | DE LUCIA, GABRIELLA | en_US |
dc.contributor.author | FONTANOT, Fabio | en_US |
dc.contributor.author | Hirschmann, Michaela | en_US |
dc.date.accessioned | 2020-12-22T11:41:21Z | - |
dc.date.available | 2020-12-22T11:41:21Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29097 | - |
dc.description.abstract | We take advantage of our recently published model for GAlaxy Evolution and Assembly (GAEA) to study the origin of the observed correlation between [α/Fe] and galaxy stellar mass. In particular, we analyse the role of radio-mode active galactic nuclei (AGN) feedback, which recent work has identified as a crucial ingredient to reproduce observations. In GAEA, this process introduces the observed trend of star formation histories extending over shorter time-scales for more massive galaxies, but does not provide a sufficient condition to reproduce the observed α enhancements of massive galaxies. In the framework of our model, this is possible only by assuming that any residual star formation is truncated for galaxies more massive than 10<SUP>10.5</SUP> M<SUB>☉</SUB>. This results, however, in even shorter star formation time-scales for the most massive galaxies, which translate in total stellar metallicities significantly lower than observed. Our results demonstrate that (I) trends of [α/Fe] ratios cannot be simply converted into relative time-scale indicators; and (II) AGN feedback cannot explain alone the positive correlation between [α/Fe] and galaxy mass/velocity dispersion. Reproducing simultaneously the mass-metallicity relation and the α enhancements observed pose a challenge for hierarchical models, unless more exotic solutions are adopted such as metal-rich winds or a variable initial mass function. | en_US |
dc.language.iso | eng | en_US |
dc.title | AGN feedback and the origin of the α enhancement in early-type galaxies - insights from the GAEA model | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnrasl/slw242 | en_US |
dc.identifier.scopus | 2-s2.0-85018299570 | en_US |
dc.identifier.isi | 000410059100019 | en_US |
dc.identifier.url | https://academic.oup.com/mnrasl/article/466/1/L88/2638361 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 466 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L88 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | 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 | 2017MNRAS.466L..88D | 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.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 | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.orcid | 0000-0002-6220-9104 | - |
crisitem.author.orcid | 0000-0003-4744-0188 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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1611.04597(1).pdf | postprint | 231.59 kB | Adobe PDF | View/Open |
slw242.pdf | Pdf editoriale | 397.55 kB | Adobe PDF | View/Open |
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