Cosmic metallicity evolution of Active Galactic Nuclei: implications for optical diagnostic diagrams

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dc.contributor.authorDors Junior, Oli Luiz
dc.contributor.authorCardaci, Mónica Viviana
dc.contributor.authorHägele, Guilhermo F.
dc.contributor.authorIlha, Gabriele da Silva
dc.contributor.authorOliveira Junior, Celso Benedito de
dc.contributor.authorRiffel, Rogemar A.
dc.contributor.authorRiffel, Rogério
dc.contributor.authorKrabbe, Angela Cristina
dc.date.accessioned2025-02-13T15:23:59Z
dc.date.available2025-02-13T15:23:59Z
dc.date.issued22023
dc.description.abstractWe analyse the validity of optical diagnostic diagrams relying on emission-lines ratios and in the context of classifying Active Galactic Nuclei (AGNs) according to the cosmic metallicity evolution in the redshift range⁠. In this regard, we fit the results of chemical evolution models (CEMs) to the radial gradients of the N/O abundances ratio derived through direct estimates of electron temperatures (Te-method) in a sample of four local spiral galaxies. This approach allows us to select representative CEMs and extrapolate the radial gradients to the nuclear regions of the galaxies in our sample, inferring in this way the central N/O and O/H abundances. The nuclear abundance predictions for theoretical galaxies from the selected CEMs, at distinct evolutionary stages, are used as input parameters in AGN photoionization models built with the Cloudy code. We found that standard BPT diagnostic diagrams are able to classify AGNs with oxygen abundances at redshift. On the other hand, the He iiλ4685/Hβ versus [N ii]λ6584/Hα diagram produces a reliable AGN classification independent of the evolutionary stage of these objects.
dc.description.physical20 p.
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriFAPESP (Proj. 2022/11799-9)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationUniversidad Nacional de La Plata
dc.identifier.affiliationUniversidade Federal do Rio Grande do Sul
dc.identifier.affiliationUniversidade de São Paulo
dc.identifier.affiliationUniversidade Federal de Santa Maria
dc.identifier.bibliographicCitationDORS JUNIOR, Oli Luiz et al. Cosmic metallicity evolution of Active Galactic Nuclei: implications for optical diagnostic diagrams. Monthly Notices of the Royal Astronomical Society, v. 527, n. 3, p. 8193-8212, 2023. Disponível em:
dc.identifier.doi10.1093/mnras/stad3667
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/574
dc.language.isoen_US
dc.publisherRoyal Astronomical Society
dc.rights.holderOli Luiz Dors Junior
dc.subject.keywordISM: abundances
dc.subject.keywordGalaxies: abundances
dc.subject.keywordGalaxies: active
dc.subject.keywordGalaxies: Seyfert
dc.titleCosmic metallicity evolution of Active Galactic Nuclei: implications for optical diagnostic diagrams
dc.typeArtigos de Periódicos

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