Chemical abundances in Seyfert galaxies - IX. Helium abundance estimatesAug 1, 2022·O.~L. Dors,M. Valerdi,P. Freitas-Lemes,A.~C. Krabbe,R.~A. Riffel,E.~B. Amôres,R. Riffel,M. Armah,A.~F. Monteiro,C.~B. Oliveira· 0 min read arXiv Cite DOIpublicationLast updated on Aug 1, 2022Galaxies: Abundances Galaxies: Active Galaxies: Evolution Galaxies: Formation Galaxies: ISM Galaxies: Nuclei Astrophysics - Astrophysics of Galaxies ← Oxygen abundances in the narrow line regions of Seyfert galaxies and the metallicity-luminosity relation Apr 1, 2023Gas-phase metallicity determinations in nearby AGNs with SDSS-IV MaNGA: evidence of metal-poor accretion Jun 1, 2022 →