On the central abundances of Active Galactic Nuclei and Star-forming Galaxies

dc.creatorDors Jr., O. L.
dc.creatorCardaci, Mónica Viviana
dc.creatorHägele, Guillermo Federico
dc.creatorRodrigues, I.
dc.creatorGrebel, E. K.
dc.creatorPilyugin, L. S.
dc.creatorFreitas Lemes, P.
dc.creatorKrabbe, A. C.
dc.date2015-03
dc.date2020-04-20T20:40:30Z
dc.date.accessioned2023-07-14T19:19:24Z
dc.date.available2023-07-14T19:19:24Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/93847
dc.identifierhttp://mnras.oxfordjournals.org/content/453/4/4102
dc.identifierhttps://arxiv.org/abs/1508.07802v1
dc.identifierissn:0035-8711
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7434854
dc.descriptionWe 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.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.descriptionInstituto de Astrofísica de La Plata
dc.formatapplication/pdf
dc.format4102-4113
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 2.5 Argentina (CC BY-NC-SA 2.5)
dc.subjectAstronomía
dc.subjectFísica
dc.subjectCiencias Naturales
dc.subjectCiencias Exactas
dc.subjectEvolution of galaxies
dc.subjectAbundances
dc.subjectFormation of galaxies
dc.subjectInterstellar medium
dc.titleOn the central abundances of Active Galactic Nuclei and Star-forming Galaxies
dc.typeArticulo
dc.typeArticulo


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