C. B. Oliveira

activity

20222025

most citedChemical abundances in Seyfert galaxies -IX. Helium abundance estimates

24 citations · 48 across the 10 of their papers we have counts for

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astro-ph.GA2025

Metallicity of Active Galactic Nuclei from ultraviolet and optical emission lines-II. Revisiting the $C 43$ metallicity calibration and its implications

O. L. Dors, C. B. Oliveira, M. V. Cardaci +7

In this study, a new semi-empirical calibration is proposed between ultraviolet emission lines (\ion{C}{iii}] $λ 1909$ , \ion{C}{iv} $λ 1549$ , \ion{He}{ii}] $λ 1640$ ) of…

astro-ph.GA2025

Metallicity of Active Galactic Nuclei from ultraviolet and optical emission lines I: Carbon abundance dependence

O. L. Dors, C. B. Oliveira, M. V. Cardaci +9

Metallicity ( $Z$ ) estimates based on ultraviolet (UV) emission lines from the narrow-line regions (NLRs) of active galactic nuclei (AGNs) have been found to differ from those deriv…

Metallicity of Active Galactic Nuclei from ultraviolet and optical emission lines-II. Revisiting the C43 metallicity calibration and its implications

Metallicity of Active Galactic Nuclei from ultraviolet and optical emission lines I: Carbon abundance dependence

Metallicity of Active Galactic Nuclei from ultraviolet and optical emission lines-II. Revisiting the $C 43$ metallicity calibration and its implications