Channel maps of the polarised CO J = 3 − 2 emission around the AGB star CW Leo. The solid red contours indicate the Stokes I total intensity emission at 5%, 10%, 20%, 40%, and 80% of the peak emission (I_CO, peak = 17.89 Jy beam⁻¹). The greyscale image is the linearly polarised emission, and the line segments denote the linear polarisation direction where emission is detected at > 5σ_P. The segments are scaled to the level of fractional polarisation, with the scale indicated in the bottom-right panel. The maximum polarisation is P_l, max = 1.18%. The beam size is denoted in the bottom-right panel, and all panels are labelled with the V_lsr velocity in kilometers per second. The stellar velocity is V_lsr, * = −26.5 km s⁻¹. The dashed blue circles centred on the peak of the CO emission close to the stellar velocity indicates the radius (R ≈ 1.4″) at which we find that the direction of polarisation for CS changes from being neither tangential nor radial to predominantly tangential.