Snapshot of fiducial model at t = 75 751 yr (176 orbits), showing different components from the simulation. (a) Surface density of the gas (including vapor). The arrows indicate the velocity of the gas. (b) CH₄ ice surface density. (c) Surface density ratio of CH₄ vapor to total gas. (d) CH₄ sublimated vapor surface density. (e) Disk midplane temperature. (f) C/O ratio in the gas phase. In each panel, the red dashed circle indicates the Hill radius of the planet. A video showing the time evolution can be found in online.