English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/192083
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


A bayesian-like approach to derive chemical abundances in type-2 active galactic nuclei based on photoionization models

AuthorsPérez Montero, Enrique ; Dors, O. L.; Vílchez Medina, José Manuel ; García-Benito, Rubén ; Cardaci, M. V.; Hägele, G. F
KeywordsMethods: data analysis
ISM: abundances
Galaxies: abundances
Galaxies: active
Galaxies: Seyfert
Issue Date2019
PublisherOxford University Press
CitationMonthly Notices of the Royal Astronomical Society 489(2): 2652-2668 (2019)
AbstractWe present a new methodology for the analysis of the emission lines of the interstellar medium in the narrow-line regions around type-2 active galactic nuclei. Our aim is to provide a recipe that can be used for large samples of objects in a consistent way using different sets of optical emission lines that takes into the account possible variations from the O/H-N/O relation to use [N II] lines. Our approach consists of a bayesian-like comparison between certain observed emission-line ratios sensitive to total oxygen abundance, nitrogen-to-oxygen ratio, and ionization parameter with the predictions from a large grid of photoionization models calculated under the most usual conditions in this environment. We applied our method to a sample of Seyfert 2 galaxies with optical emission-line fluxes and determinations of their chemical properties from detailed models in the literature. Our results agree within the errors with other results and confirm the high metallicity of the objects of the sample, with N/O values consistent with a large secondary production of N, but with a large dispersion. The obtained ionization parameters for this sample are much larger than those for star-forming object at the same metallicity. © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
Publisher version (URL)http://dx.doi.org/10.1093/mnras/stz2278
Appears in Collections:(IAA) Artículos
Files in This Item:
File Description SizeFormat 
IAA_2019_stz2278.pdf8,42 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.