Periodic variations of polarization with stellar rotational phase for CIRs with different winding radius values. Left panels: polarization light curves with phase; right panels: variations in the q-u plane. Top panels: viewing inclination of i = 30° and lower: i = 60°. Different curves are for different winding radii, with values r₀/R_∗ = 1 (black), 3 (red), 9 (green), and 27 (blue).