Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs
We derived two semi-empirical calibrations between the metallicity of the narrow-line region (NLR) of type-2 active galactic nuclei and the rest frame of the N V λ1240/He II λ1640, C43 = log[(C IV λ1549 + C III]λ1909)/He II λ1640], and C III]λ1909/C IV λ1549 emission-line intensity ratios. A metalli...
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| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2019
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125214 |
| Aporte de: |
| id |
I19-R120-10915-125214 |
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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 Galaxies: abundances Galaxies: active Galaxies: evolution Galaxies: formation Galaxies: ISM Galaxies: nuclei |
| spellingShingle |
Ciencias Astronómicas Galaxies: abundances Galaxies: active Galaxies: evolution Galaxies: formation Galaxies: ISM Galaxies: nuclei Dors, O. L. Monteiro, A. F. Cardaci, Mónica Viviana Hägele, Guillermo Federico Krabbe, A. C. Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs |
| topic_facet |
Ciencias Astronómicas Galaxies: abundances Galaxies: active Galaxies: evolution Galaxies: formation Galaxies: ISM Galaxies: nuclei |
| description |
We derived two semi-empirical calibrations between the metallicity of the narrow-line region (NLR) of type-2 active galactic nuclei and the rest frame of the N V λ1240/He II λ1640, C43 = log[(C IV λ1549 + C III]λ1909)/He II λ1640], and C III]λ1909/C IV λ1549 emission-line intensity ratios. A metallicity-independent calibration between the ionization parameter and the C III]λ1909/C IV λ1549 emission-lines ratio was also derived. These calibrations were obtained comparing ratios of measured UV emission-line intensities, compiled from the literature, for a sample of 77 objects (redshift 0 < z < 3.8) with those predicted by a grid of photoionization models built with the CLOUDY code. Using the derived calibrations, it was possible to show that the metallicity estimations for NLRs are lower by a factor of about 2–3 than those for broad-line regions. Besides, we confirmed the recent result of the existence of a relation between the stellar mass of the host galaxy and its NLR metallicity. We also derived an M–Z relation for the objects in our sample at 1.6 < z < 3.8. This relation seems to follow the same trend as the ones estimated for star-forming galaxies of similar high redshifts but for higher masses. |
| format |
Articulo Articulo |
| author |
Dors, O. L. Monteiro, A. F. Cardaci, Mónica Viviana Hägele, Guillermo Federico Krabbe, A. C. |
| author_facet |
Dors, O. L. Monteiro, A. F. Cardaci, Mónica Viviana Hägele, Guillermo Federico Krabbe, A. C. |
| author_sort |
Dors, O. L. |
| title |
Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs |
| title_short |
Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs |
| title_full |
Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs |
| title_fullStr |
Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs |
| title_full_unstemmed |
Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs |
| title_sort |
semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 agns |
| publishDate |
2019 |
| url |
http://sedici.unlp.edu.ar/handle/10915/125214 |
| work_keys_str_mv |
AT dorsol semiempiricalmetallicitycalibrationsbasedonultravioletemissionlinesoftype2agns AT monteiroaf semiempiricalmetallicitycalibrationsbasedonultravioletemissionlinesoftype2agns AT cardacimonicaviviana semiempiricalmetallicitycalibrationsbasedonultravioletemissionlinesoftype2agns AT hageleguillermofederico semiempiricalmetallicitycalibrationsbasedonultravioletemissionlinesoftype2agns AT krabbeac semiempiricalmetallicitycalibrationsbasedonultravioletemissionlinesoftype2agns |
| bdutipo_str |
Repositorios |
| _version_ |
1764820451383574531 |