Temperature distribution in the density solution to an infalling-rotating collapse model. The values r_c = 60 au, M_* = 0.2 M_⊙, and Ṁ = 4.05 × 10⁻⁷ M_⊙ yr⁻¹ using only coagulated bare-grain opacities, assuming a gas number density of 10⁶ cm⁻³. The density contours in solid lines are logarithmically spaced, increasing toward the midplane (the x-axis), while the dust temperature contours are shown in dashed lines.