Predicted peak radio flux density as a function of three times the local RMS for the nonthermal (left) and thermal (right) scenarios. This plot contains the original data presented in van den Eijnden et al. (2022b), and our sources in yellow and magenta colors, with different symbols depending on the scenario conditions. The one-to-one line is shown by the red line; sources above it should, at minimum, have observable emission in a single beam.