Comparison between the CO v = 1, J = 3−2 and stacked TiO₂ lines observed using ALMA and the polarized light observed using ZIMPOL. The colour map shows the stacked emission from the nine unblended TiO₂ lines (see Table 2) normalized to the peak value. The 2 and 3% levels of the polarization degree at 0.65 and 0.82 μm are shown by the dashed white and orange lines, respectively. The yellow solid contour shows the 10% level of the CO v = 1, J = 3−2 emission. The white and yellow ellipses on the lower right corner show, respectively, the FWHM of the observed PSF reference star in the NR filter (which is very similar to that using filter cnt820) and the beam of the ALMA observations. The offsets in declination and right ascension are given with respect to the position of Mira A.