Gas disk structure. Top panel: total hydrogen number density n_{⟨ H ⟩}. The height of the disk z is scaled by the radius r. The white dashed contours correspond to the density levels shown in the colour bar. Bottom panel: total vertical hydrogen column number density N_{⟨ H ⟩ ,ver} as a function of radius where on the right-hand side also the scale for the surface density Σ in g cm^-2 is given.