Upper panel: jet width D, given by the FWHM size of the jet components, plotted as a function of their distance from the jet base. The dashed line is fitted via D = C(d + d_{c,  43,  app})^l, where d_{c,  43,  app} is the apparent distance of the 43 GHz core to the jet base, d is the distance from the core to the jet component, C is a constant, and l is the power law index representing the jet geometry. The best fit results in l = 0.974 ± 0.098 which is consistent with a conical jet. Lower panel: observed brightness temperature T_B of the jet components plotted as a function of the components’ distances to the jet base. The dashed line is fitted via log(T_B) = s ⋅ log(d + d_{c,  43,  app})+log(C), in which d_{c,  43,  app} is the apparent distance of the 43 GHz core to the jet base and s is the brightness-temperature gradient. For d_{c,  43,  app} we used the value derived in Sect. 3.1.3. The best fit results in s = −3.31 ± 0.31 which corresponds to a conical jet in equilibrium between magnetic field strength density and electron energy density (Burd et al. 2022).