On the central abundances of Active Galactic Nuclei and Star-forming Galaxies
We examine the relation between oxygen abundances in the narrow-line regions (NLRs) of active galactic nuclei (AGNs) estimated from the optical emission lines through the strong-line method (the theoretical calibration of Storchi-Bergmann et al. 1998), via the direct Te-method, and the central inter...
| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2015
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/93847 http://mnras.oxfordjournals.org/content/453/4/4102 https://arxiv.org/abs/1508.07802v1 |
| Aporte de: |
| id |
I19-R120-10915-93847 |
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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 |
Astronomía Física Ciencias Naturales Ciencias Exactas Evolution of galaxies Abundances Formation of galaxies Interstellar medium |
| spellingShingle |
Astronomía Física Ciencias Naturales Ciencias Exactas Evolution of galaxies Abundances Formation of galaxies Interstellar medium Dors Jr., O. L. Cardaci, Mónica Viviana Hägele, Guillermo Federico Rodrigues, I. Grebel, E. K. Pilyugin, L. S. Freitas Lemes, P. Krabbe, A. C. On the central abundances of Active Galactic Nuclei and Star-forming Galaxies |
| topic_facet |
Astronomía Física Ciencias Naturales Ciencias Exactas Evolution of galaxies Abundances Formation of galaxies Interstellar medium |
| description |
We examine the relation between oxygen abundances in the narrow-line regions (NLRs) of active galactic nuclei (AGNs) estimated from the optical emission lines through the strong-line method (the theoretical calibration of Storchi-Bergmann et al. 1998), via the direct Te-method, and the central intersect abundances in the host galaxies determined from the radial abundance gradients. We found that the T<sub>e</sub>-method underestimates the oxygen abundances by up to ∼2 dex (with average value of ~0.8 dex) compared to the abundances derived through the strong-line method. This con- firms the existence of the so-called ?temperature problem? in AGNs. We also found that the abundances in the centres of galaxies obtained from their spectra trough the strong-line method are close to or slightly lower than the central intersect abun- dances estimated from the radial abundance gradient both in AGNs and Star-forming galaxies. The oxygen abundance of the NLR is usually lower than the maximum at- tainable abundance in galaxies (~2 times the solar value). This suggests that there is no extraordinary chemical enrichment of the NLRs of AGNs. |
| format |
Articulo Articulo |
| author |
Dors Jr., O. L. Cardaci, Mónica Viviana Hägele, Guillermo Federico Rodrigues, I. Grebel, E. K. Pilyugin, L. S. Freitas Lemes, P. Krabbe, A. C. |
| author_facet |
Dors Jr., O. L. Cardaci, Mónica Viviana Hägele, Guillermo Federico Rodrigues, I. Grebel, E. K. Pilyugin, L. S. Freitas Lemes, P. Krabbe, A. C. |
| author_sort |
Dors Jr., O. L. |
| title |
On the central abundances of Active Galactic Nuclei and Star-forming Galaxies |
| title_short |
On the central abundances of Active Galactic Nuclei and Star-forming Galaxies |
| title_full |
On the central abundances of Active Galactic Nuclei and Star-forming Galaxies |
| title_fullStr |
On the central abundances of Active Galactic Nuclei and Star-forming Galaxies |
| title_full_unstemmed |
On the central abundances of Active Galactic Nuclei and Star-forming Galaxies |
| title_sort |
on the central abundances of active galactic nuclei and star-forming galaxies |
| publishDate |
2015 |
| url |
http://sedici.unlp.edu.ar/handle/10915/93847 http://mnras.oxfordjournals.org/content/453/4/4102 https://arxiv.org/abs/1508.07802v1 |
| work_keys_str_mv |
AT dorsjrol onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies AT cardacimonicaviviana onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies AT hageleguillermofederico onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies AT rodriguesi onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies AT grebelek onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies AT pilyuginls onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies AT freitaslemesp onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies AT krabbeac onthecentralabundancesofactivegalacticnucleiandstarforminggalaxies |
| bdutipo_str |
Repositorios |
| _version_ |
1764820491832393730 |