Distribution of the angle Δϕ between intensity gradient and the magnetic field direction in regions D1 (left column) and D2 (middle column), and the bridge (left).We compare Δϕ for the cases of RAT alignment (long-dashed red), RAT alignment and scattering (solid blue), and perfect alignment (short-dashed black) for 89 μm (top row) and 1.3 mm (bottom row) observations (compare Figs. 6, 7, and 9). Vertical lines indicate the mean of each distribution. We note that the mean values and trends are similar in the distinct regions for 1.3 mm observations, while the 89 μm observationsdepend heavily on the considered polarization mechanism.