Moment-zero maps for two different disk masses hosting planets located at two different semi-major axes (rows) for three different planet masses (columns). We show the maps issued from RADMC-3D and CASA. The disks are located at 40 pc. The disk’s mass is 10⁻³ M_⊕ of CO in the first and third rows and 10⁻¹ M_⊕ in the second and last rows. As expected, the more massive disks are more luminous. The gas present in the gap can become luminous enough to prevent a clear detection of the gap, as in the lower disk-mass case.