New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index

dc.creatorCastro, Cínthia S.
dc.creatorDors, Oli L.
dc.creatorCardaci, Mónica Viviana
dc.creatorHägele, Guillermo Federico
dc.date2017-01-20
dc.date2021-08-26T13:47:18Z
dc.date.accessioned2023-07-15T02:53:30Z
dc.date.available2023-07-15T02:53:30Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/123493
dc.identifierissn:0035-8711
dc.identifierissn:1365-2966
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7463662
dc.descriptionWe derive a new relation between the metallicity of Seyfert 2 active galactic nuclei (AGNs) and the intensity of the narrow emission-lines ratio N2O2 = log([N II] λ6584/[O II] λ3727). The calibration of this relation was performed by determining the metallicity (Z) of a sample of 58 AGNs through a diagram containing the observational data and the results of a grid of photoionization models obtained with the CLOUDY code. We find the new Z/Z⊙–N2O2 relation using the obtained metallicity values and the corresponding observational emission-line intensities for each object of the sample. Estimations derived through the use of this new calibration indicate that the narrow-line regions of Seyfert 2 galaxies exhibit a large range of metallicities (0.3 ≲ Z/Z⊙ ≲ 2.0), with a median value Z ≈ Z⊙. Regarding the possible existence of correlations between the luminosity L(Hβ), the electron density and the colour excess E(B − V) with the metallicity in this kind of objects, we do not find correlations between them.
dc.descriptionInstituto de Astrofísica de La Plata
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.formatapplication/pdf
dc.format1507-1514
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.subjectCiencias Astronómicas
dc.subjectCiencias Exactas
dc.subjectGalaxies: abundances
dc.subjectGalaxies: evolution
dc.subjectGalaxies: formation
dc.subjectGalaxies: general
dc.subjectGalaxies: ISM
dc.titleNew metallicity calibration for Seyfert 2 galaxies based on the N2O2 index
dc.typeArticulo
dc.typeArticulo


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