Profiles of the wind driven halo showing the asymmetry in a SPHERE-IRDIS image. The solid line is along the brighter and bigger wing; the dashed line is along the fainter and smaller wing. Top panel: radial profile along the WDH direction (black solid and red long-dashed lines) and its perpendicular direction (blue dashed lines). The DM cutoff frequency is at 20λ/D (green dot-dashed line). Bottom panel: azimuthal profile at 6λ/D from the star.