Chemical abundances in Seyfert galaxies – VII. Direct abundance determination of neon based on optical and infrared emission lines

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dc.contributor.authorArmah, Mark
dc.contributor.authorDors Júnior, Oli Luiz
dc.contributor.authorAydar, Catarina Pasta
dc.contributor.authorCardaci, Mónica Viviana
dc.contributor.authorHägele, Guilhermo Frederico
dc.contributor.authorFeltre, Anna
dc.contributor.authorRiffel, Rogério
dc.contributor.authorRiffel, Rogemar André
dc.contributor.authorKrabbe, Angela Cristina
dc.date.accessioned2025-04-04T14:23:08Z
dc.date.available2025-04-04T14:23:08Z
dc.date.issued22021
dc.description.abstractFor the first time, neon abundance has been derived in the narrow line region from a sample of Seyfert 2 nuclei. In view of this, we compiled from the literature fluxes of optical and infrared (IR) narrow emission lines for 35 Seyfert 2 nuclei in the local universe (z 0.06). The relative intensities of emission lines were used to derive the ionic and total neon and oxygen abundances through electron temperature estimations (Te-method). For the neon, abundance estimates were obtained by using both Te-method and IR-method. Based on photoionization model results, we found a lower electron temperature [te(Ne iii)] for the gas phase where the Ne2 + is located in comparison with t3 for the O2 + ion. We find that the differences (D) between Ne2 +/H+ ionic abundances calculated from IR-method and Te-method (assuming t3 in the Ne2 +/H+ derivation) are similar to the derivations in star-forming regions (SFs) and they are reduced by a mean factor of ∼3 when te(Ne iii) is considered. We propose a semi-empirical Ionization Correction Factor (ICF) for the neon, based on [Ne II]12.81μm, [Ne III]15.56μm, and oxygen ionic abundance ratios. We find that the average Ne/H abundance for the Seyfert 2s sample is nearly 2 times higher than similar estimate for SFs. Finally, for the very high metallicity regime (i.e. [12 + log(O/H) 8.80]) an increase in Ne/O with O/H is found, which likely indicates secondary stellar production for the neon.
dc.description.physical21 p.
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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.uriCNPq (202582/2018-3, 304927/2017-1, 400352/2016-8, and 312036/2019-1)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationUniversidade Federal do Rio Grande do Sul
dc.identifier.affiliationUniversidade de Sao Paulo
dc.identifier.affiliationUniversidad Nacional de La Plata
dc.identifier.affiliationOsservatorio di Astrofisica e Scienza dello Spazio di Bologna
dc.identifier.affiliationUniversidade Federal de Santa Maria
dc.identifier.bibliographicCitationARMAH, Mark et al. Chemical abundances in Seyfert galaxies – VII. Direct abundance determination of neon based on optical and infrared emission lines. Monthly Notices of the Royal Astronomical Society, v. 508, n. 1, p. 371-391, 2021. Disponível em: https://academic.oup.com/mnras/article/508/1/371/6371130.
dc.identifier.doi10.1093/mnras/stab2610
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/804
dc.language.isoen_US
dc.publisherRoyal Astronomical Society
dc.rights.holderMonthly Notices of the Royal Astronomical Society
dc.subject.keywordGalaxies: abundances
dc.subject.keywordGalaxies: active
dc.subject.keywordGalaxies evolution
dc.subject.keywordGalaxies nuclei
dc.titleChemical abundances in Seyfert galaxies – VII. Direct abundance determination of neon based on optical and infrared emission lines
dc.typeArtigos de Periódicos

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