SEDs applying Eddington ratios from Table 1 for a HIGH-mass (blue curves) and LOW-mass (orange curves) system for SIM20, SIM21, SIM22, SIM23, SIM24, and SIM26 respectively. The three vertical lines correspond to 86 GHz, 230 GHz, and 345 GHz, respectively. The figures also mark the optically thin and optically thick regions of the thermal synchrotron, which lie on the right and left sides of the thermal synchrotron peak marked by the red diamond.