Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS

We compare the oxygen abundance (O/H) of the Narrow Line Regions (NLRs) of Seyfert 2 AGNs obtained through strong-line methods and from direct measurements of the electron temperature (Te-method). The aim of this study is to explore the effects of the use of distinct methods on the range of metallic...

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Detalles Bibliográficos
Autores principales:	Dors, O. L., Freitas Lemes, P., Amôres, E. B., Pérez Montero, E., Cardaci, Mónica Viviana, Hägele, Guillermo Federico, Armah, M., Krabbe, A., Faúndez Abans, M.
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2019
Materias:	Ciencias Astronómicas Galaxies: abundances Galaxies: active ISM: abundances Galaxies: nuclei Galaxies: seyfert
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125527
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125527
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas Galaxies: abundances Galaxies: active ISM: abundances Galaxies: nuclei Galaxies: seyfert
spellingShingle	Ciencias Astronómicas Galaxies: abundances Galaxies: active ISM: abundances Galaxies: nuclei Galaxies: seyfert Dors, O. L. Freitas Lemes, P. Amôres, E. B. Pérez Montero, E. Cardaci, Mónica Viviana Hägele, Guillermo Federico Armah, M. Krabbe, A. Faúndez Abans, M. Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS
topic_facet	Ciencias Astronómicas Galaxies: abundances Galaxies: active ISM: abundances Galaxies: nuclei Galaxies: seyfert
description	We compare the oxygen abundance (O/H) of the Narrow Line Regions (NLRs) of Seyfert 2 AGNs obtained through strong-line methods and from direct measurements of the electron temperature (Te-method). The aim of this study is to explore the effects of the use of distinct methods on the range of metallicity and on the mass-metallicity relation of AGNs at low redshifts (z ≲ 0.4). We used the Sloan Digital Sky Survey (SDSS) and NASA/IPAC Extragalactic Database (NED) to selected optical (3000 < λ(Å) < 7000) emission line intensities of 463 confirmed Seyfert 2 AGNs. The oxygen abundance of the NLRs were estimated using the theoretical Storchi-Bergmann et al. calibrations, the semi-empirical N2O2 calibration, the bayesian H ii-Chi-mistry code and the Te-method. We found that the oxygen abundance estimations via the strongline methods differ from each other up to ∼ 0.8 dex, with the largest discrepancies in the low metallicity regime (12 + log(O/H) ≲8.5). We confirmed that the Te-method underestimates the oxygen abundance in NLRs, producing unreal subsolar values. We did not find any correlation between the stellar mass of the host galaxies and the metallicity of their AGNs. This result is independent of the method used to estimate Z.
format	Articulo Preprint
author	Dors, O. L. Freitas Lemes, P. Amôres, E. B. Pérez Montero, E. Cardaci, Mónica Viviana Hägele, Guillermo Federico Armah, M. Krabbe, A. Faúndez Abans, M.
author_facet	Dors, O. L. Freitas Lemes, P. Amôres, E. B. Pérez Montero, E. Cardaci, Mónica Viviana Hägele, Guillermo Federico Armah, M. Krabbe, A. Faúndez Abans, M.
author_sort	Dors, O. L.
title	Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS
title_short	Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS
title_full	Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS
title_fullStr	Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS
title_full_unstemmed	Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS
title_sort	chemical abundances of seyfert 2 agns - i. comparing oxygen abundances from distinct methods using sdss
publishDate	2019
url	http://sedici.unlp.edu.ar/handle/10915/125527
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Chemical abundances of Seyfert 2 AGNs - I. Comparing oxygen abundances from distinct methods using SDSS

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