Median polarization angle across all jet models and viewing angles θ = 2°, 5°, 10°, and 20°, for the particle injection model M_B (median polarization angles for model M_p are only shown for θ = 20° because there are no qualitative differences with model M_B for lower values of the viewing angle; see the linearly polarized intensity maps in Figs. 1–3). Shaded regions represent the median absolute deviation of each model. Thin dashed lines represent the integrated polarized intensity (normalized). Models were smoothed for the computations through a convolution with a beam of size 0.5 R_j FWHM. Abscissa axis units as in Fig. 5.