Polarization maps of CO (J = 2 → 1) spectral lines in the blue-shifted (left) and red-shifted (right) wings after the conversion of the circular polarization levels into linear and re-calculation of the polarization vectors. Similar to Figs. 3 and 4, only polarization vectors with p ≥ 3σ_p are plotted. The beam size for each map is shown in the lower right corners and the offsets are with respect to the reference coordinates , δ   (J2000) = + 22°39′36″.