Left and center: SPHERE PI image with lines indicating the angle of linear polarization overplotted, showing two different fields of view (0.7″ × 0.7″, 2.3″ × 2.3″). The lines have an arbitrary length. For the computation of the polarization angles, we ignored bins at which the binned polarized intensity values ≤1.9. Right: polarized intensity image with ALMA Band 7 (0.9 mm) continuum contours overplotted (blue). The ALMA observationswere published in Phuong et al. (2020a). The ALMA image was registered such that the inner continuum emission, attributed to a circumstellar disk around Aa, coincides with the NIR position of Aa. Contours are shown at 20, 30,.., 80,90% of the peak intensity. The beam size is indicated in the lower left corner.