Metallicity Determination in Seyfert 2 AGNs

MONTEIRO, A.F.; HÄGELE, G.F.; DORS, O.L.; CARDACI, M.V.

Sao Jose dos Campos

Workshop; II workshop on Chemical Abundances in Gaseous Nebulae: Open problems in Nebular Astrophysics; 2019

Universidade do Vale do Paraíba.

Aims: To study calibrations of line ratios that can estimates metallicities of galaxies even in large redshift where the measurement of faint emission lines is not easy to obtain. Methods: We use the Cloudy Code to build a grid of photoionization models with lines ratios from the UV and, we compare with a sample of 77 object AGNs Seyfert 2. Results: We build semi-empirical calibrations between the metallicity of studied objects and the rest-frame intensity of the line ratios N V λ1240 / HeII λ1640, C43=log[(Civ λ1549 + CIII] λ1909) / HeII λ1640] and CIII] λ1909 / C IV λ1549.