HII-CHI-mistry for active galactic nuclei: optical sulphur abundances without empirical ionisation correction factors

E. Pérez-Montero, O. L. Dors, I. A. Zinchenko +2

> The determination of sulphur abundances in active galactic nuclei (AGN) is uncertain because ionisation correction factors (ICFs) are commonly calibrated for HII regions. We exte…