Similar to Fig. 1, but here the FUV irradiation in G₀ is shown as the color of the Herbig disk markers. O- and B-type stars are plotted as the stars, where the color (and size) indicates their spectral type. The Herbig disk with a blue edge was also detected with NOEMA in at least ¹³CO. For HD 34282, ¹³CO and C¹⁸O were detected with ALMA; for HD 245185 and V1012 Ori, ¹²CO is very bright and is detected with ALMA (Stapper et al. 2024).