Temperature T₀ before planet insertion (top) and the temperature difference T − T₀ after gap opening (bottom; taken at t = 3500 P_orb) in the vertical plane of the disk. The quantities are azimuthally averaged. The Hill sphere and the location of a Jupiter-mass planet are displayed in the bottom panel. We point out that the scale of the vertical axis is exaggerated. The temperature increase due to the irradiation of the outer gap edge is clearly visible in the bottom panel.