Two-dimensional gas surface density in log scale for h/r = 0.05, 0.07, and 0.1 from left to right panel blocks. In each block, the models for α = 10⁻⁴, 10⁻³, 10⁻² are shown from left to right. The planet mass increases from top to bottom, namely M_p = 11 M_⊕, 33 M_⊕, 0.3 M_J, 1 M_J and 3 M_J, if M_* = M_⊙. In each panel, the star is located at the center, and the plotting region is 3 × 3 in units of r_p, where r_p is the distance between the star and the planet. The planet is located at (x, y) = (1, 0) and orbits counterclockwise around the star. Σ_max and Σ_min are chosen to highlight the structures in each panel.