R-band (0.65 μm) polarimetric emission map, moment 0 map of the ¹²CO J = 3-2 line, and continuum emission map at 850 μm for the α = 10⁻³ simulations. The resolution is set to 0.03 ^′′; the disk is located at a distance of 150 pc. The white dot in each panel indicates the distance of the planet from the central star. The bottom row shows the quantities R_gap, R_CO, and R_mm, which are defined in Sect. 4.2.