Physical structure of the three protoplanetary disk models. The left panels are for the reference model (R), the middle panels are for the gas-poor gap model (A), and the right panels are for the gas-rich gap model (B). Upper row: column densities of gas and dust. The dust column density is multiplied by 100 for comparison purposes with the gas and the typical dust-to-gas mass ratio of 0.01. Second row: the upper half of each panel is the gas density, and the bottom half is the dust density, multiplied by 100 for comparison. Bottom row: the upper half of each panel is the gas temperature, and the bottom half is the dust temperature. The location of the gap is marked by a hatched rectangle. The 20 and 40 K gas temperature isotherms are shown as blue and red contour lines, respectively.