Performance of estimators based on neon ((a) and (c)) and argon ((b) and (d)) emission lines. Panels a and b show the behaviour of estimators Ne23 and Ar23 for SFG models, with plus symbols presenting values from our SFG sample. Panels c and d show the behaviour of estimators Ne235 and Ar235 for AGNs. SF models presented by Fernández-Ontiveros et al. (2021) are shown as dashed lines, while AGN models presented by Pérez-Díaz et al. (2022) are shown as continuous lines.