Armah, MarkRiffel, RogérioDors Junior, Oli LuizOh, KyuseokKoss, Michael J.Ricci, ClaudioTrakhtenbrot, BennyValerdi, MabelRiffel, Rogemar AndréKrabbe, Angela Cristina2025-02-272025-02-27https://repositorio.univap.br/handle/123456789/597We present oxygen abundances relative to hydrogen (O/H) in the narrow line regions (NLRs) gas phases of Seyferts 1 (Sy 1s) and Seyferts 2 (Sy 2s) active galactic nuclei (AGNs). We used fluxes of the optical narrow emission line intensities [Å] of 561 Seyfert nuclei in the local Universe ( z ≲ 0.31) from the second catalogue and data release (DR2) of the BAT AGN Spectroscopic Survey, which focuses on the Swift-BAT hard X-ray (≳ 10 keV) detected AGNs. We derived O/H from relative intensities of the emission lines via the strong-line methods. We find that the AGN O/H abundances are related to their hosts stellar masses and that they follow a downward redshift evolution. The derived O/H together with the hard X-ray luminosity (LX) were used to study the X-ray luminosity–metallicity (LX–ZNLR) relation for the first time in Seyfert galaxies. In contrast to the broad-line focused (LX–ZBLR) studies, we find that the LX–ZNLR exhibit significant anticorrelations with the Eddington ratio (λEdd) and these correlations vary with redshifts. This result indicates that the low-luminous AGNs are more actively undergoing interstellar medium enrichment through star formation in comparison with the more luminous X-ray sources. Our results suggest that the AGN is somehow driving the galaxy chemical enrichment, as a result of the inflow of pristine gas that is diluting the metal rich gas, together with a recent cessation on the circumnuclear star-formation.PDFen-USOxygen abundances in the narrow line regions of Seyfert galaxies and the metallicity–luminosity relationArtigos de PeriódicosMark Armah et al.10.1093/mnras/stad217Galaxies: abundancesGalaxies: activeGalaxies: evolutionGalaxies: formationGalaxies: ISMGalaxies: SeyfertARMAH, Mark et al. Oxygen abundances in the narrow line regions of Seyfert galaxies and the metallicity–luminosity relation. Monthly Notices of the Royal Astronomical Society, v. 520, n. 2, p. 1687-1703, 2023. Disponível em:Universidade Federal do Rio Grande do SulUniversidade do Vale do ParaíbaKorea Astronomy and Space Science InstituteEureka ScientificUniversidad Diego PortalesTel Aviv UniversityInstituto Nacional de AstrofísicaLaboratório Interinstitucional de e-Astronomia