Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/29581
Campo DC | Valore | Lingua |
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dc.contributor.author | BELFIORE, FRANCESCO MICHEL CONCETTO | en_US |
dc.contributor.author | Maiolino, Roberto | en_US |
dc.contributor.author | Tremonti, Christy | en_US |
dc.contributor.author | Sánchez, Sebastian F. | en_US |
dc.contributor.author | Bundy, Kevin | en_US |
dc.contributor.author | Bershady, Matthew | en_US |
dc.contributor.author | Westfall, Kyle | en_US |
dc.contributor.author | Lin, Lihwai | en_US |
dc.contributor.author | Drory, Niv | en_US |
dc.contributor.author | Boquien, Médéric | en_US |
dc.contributor.author | Thomas, Daniel | en_US |
dc.contributor.author | Brinkmann, Jonathan | en_US |
dc.date.accessioned | 2021-01-07T16:00:41Z | - |
dc.date.available | 2021-01-07T16:00:41Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29581 | - |
dc.description.abstract | We study the gas phase metallicity (O/H) and nitrogen abundance gradients traced by star-forming regions in a representative sample of 550 nearby galaxies in the stellar mass range 10<SUP>9</SUP>-10<SUP>11.5</SUP> M<SUB>☉</SUB> with resolved spectroscopic data from the Sloan Digital Sky Survey IV Mapping Nearby Galaxies at Apache Point Observatory survey. Using strong-line ratio diagnostics (R23 and O3N2 for metallicity and N2O2 for N/O) and referencing to the effective (half-light) radius (R<SUB>e</SUB>), we find that the metallicity gradient steepens with stellar mass, lying roughly flat among galaxies with log (M<SUB>⋆</SUB>/M<SUB>☉</SUB>) = 9.0 but exhibiting slopes as steep as -0.14 dex R_e^{-1} at log (M<SUB>⋆</SUB>/M<SUB>☉</SUB>) = 10.5 (using R23, but equivalent results are obtained using O3N2). At higher masses, these slopes remain typical in the outer regions of our sample (R > 1.5R<SUB>e</SUB>), but a flattening is observed in the central regions (R < 1R<SUB>e</SUB>). In the outer regions (R > 2.0R<SUB>e</SUB>), we detect a mild flattening of the metallicity gradient in stacked profiles, although with low significance. The N/O ratio gradient provides complementary constraints on the average chemical enrichment history. Unlike the oxygen abundance, the average N/O profiles do not flatten out in the central regions of massive galaxies. The metallicity and N/O profiles both depart significantly from an exponential form, suggesting a disconnect between chemical enrichment and stellar mass surface density on local scales. In the context of inside-out growth of discs, our findings suggest that central regions of massive galaxies today have evolved to an equilibrium metallicity, while the nitrogen abundance continues to increase as a consequence of delayed secondary nucleosynthetic production. | en_US |
dc.language.iso | eng | en_US |
dc.title | SDSS IV MaNGA - metallicity and nitrogen abundance gradients in local galaxies | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx789 | en_US |
dc.identifier.scopus | 2-s2.0-85023782675 | en_US |
dc.identifier.isi | 000402825000009 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/469/1/151/3098178 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 469 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 151 | en_US |
dc.type.referee | REF_1 | 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.469..151B | 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 | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-2545-5752 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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