BPT diagram, analog of Fig. 7, where the line ratio predictions for AGNs are obtained using the recent models of Thomas et al. (2016, 2018). For AGN models with the same ionization parameter (colored as indicated in the legend), the circles are the predictions obtained with E_peak = 20 eV, while the square symbols are derived assuming E_peak = 100 eV. The marker size varies as a function of gas density (from 10² to 10⁴ cm⁻³ from the smaller to the larger). The three points with the same marker, size, and color, are the predictions of three different values of p_NT: 0.1, 0.25, and 0.4. The lines, markers, and colors for the star-forming models and observations are the same as in Fig. 7.