Degeneracy plots for Arp 299 B+C. Each plot represents the full grid of models for each phase in Fig. 4, PDR I (left), PDR II (center), PDR III (right). The asterisk represents the model with the lowest χ², which are also plotted in Fig. 4. The gray scale of each small square indicates the associated log(χ²) value for that particular model, white being the best fits and black being the worst. The χ² value is defined in Eq. (3) and shown in log gray scale.