Amplitude of the Faraday dispersion function (FDF) after applying RM synthesis. The Faraday depth (ϕ) varies from − 2 × 10⁸ to + 2 ×10⁸ rad m⁻² sampled at intervals of 10⁴ rad m⁻². The dirty FDFs are shown for q = Q∕I (green dotted line), u = U∕I (magenta dot-dashed line), and p (blue dashed line); the FDF after applying RM CLEAN is also shown (solid black line). The inset panel in the top right is a zoom-inof the main lobe of the FDF, while the bottom right is further zoomed-in to highlight the non-zero Faraday depth of the peak polarized emission (vertical dotted line in both cases).