New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index
We 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 d...
| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/123493 |
| Aporte de: |
| id |
I19-R120-10915-123493 |
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| 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 Ciencias Exactas Galaxies: abundances Galaxies: evolution Galaxies: formation Galaxies: general Galaxies: ISM |
| spellingShingle |
Ciencias Astronómicas Ciencias Exactas Galaxies: abundances Galaxies: evolution Galaxies: formation Galaxies: general Galaxies: ISM Castro, Cínthia S. Dors, Oli L. Cardaci, Mónica Viviana Hägele, Guillermo Federico New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index |
| topic_facet |
Ciencias Astronómicas Ciencias Exactas Galaxies: abundances Galaxies: evolution Galaxies: formation Galaxies: general Galaxies: ISM |
| description |
We 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. |
| format |
Articulo Articulo |
| author |
Castro, Cínthia S. Dors, Oli L. Cardaci, Mónica Viviana Hägele, Guillermo Federico |
| author_facet |
Castro, Cínthia S. Dors, Oli L. Cardaci, Mónica Viviana Hägele, Guillermo Federico |
| author_sort |
Castro, Cínthia S. |
| title |
New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index |
| title_short |
New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index |
| title_full |
New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index |
| title_fullStr |
New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index |
| title_full_unstemmed |
New metallicity calibration for Seyfert 2 galaxies based on the N2O2 index |
| title_sort |
new metallicity calibration for seyfert 2 galaxies based on the n2o2 index |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/123493 |
| work_keys_str_mv |
AT castrocinthias newmetallicitycalibrationforseyfert2galaxiesbasedonthen2o2index AT dorsolil newmetallicitycalibrationforseyfert2galaxiesbasedonthen2o2index AT cardacimonicaviviana newmetallicitycalibrationforseyfert2galaxiesbasedonthen2o2index AT hageleguillermofederico newmetallicitycalibrationforseyfert2galaxiesbasedonthen2o2index |
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Repositorios |
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1764820449635598336 |