Fig. C.1.
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Radial variation of the pitch angle for each spiral arm identified in UG101 (left) and UG103 (right). Points represent the measured pitch angles, and solid lines show the trends derived from a moving median. For reference, the shaded regions indicate the ranges spanned by the inner and outer spiral arms of undisturbed (gray) and RPS-driven galaxies, as reported by Bellhouse et al. (2021).
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