The radial temperature profiles at different heights for the setup of Figure 8 (left) and disks with 100×higher density (right), and α = 10⁻⁴. From top to bottom, the heights are picked at the disk’s midplane, big grains’ scale height, gaseous scale height and upper atmosphere. The bottom panels show the spectral index between 1.25 mm and 0.87 mm. Solid lines are the MCRT results with both big and small grains. Dashed lines are the temperatures profiles for MCRT with only small grains included. Dotted-dashed curves show big-grain-only cases.