Intrinsic brightness temperature profiles of the Gaussian component at different frequencies. The horizontal dashed lines represent the median equipartition brightness temperature derived from sample studies, T_b = 5 × 10¹⁰ K, and the upper limit T_b = 10¹¹ K. Left panel: brightness temperature values for the jet components. The continuous lines are the best-fit power laws at different frequencies. Right panel: brightness temperature values for the core components.