Two 1D Cloudy slab models of the inner disk around ~0.03 AU. Input stellar parameters are for DR Tau. Left: physical properties are plotted as a function of hydrogen column density for a vertical slab located at 0.03 AU with a power law density structure extending towards the disk midplane. These include: fractional abundance of dominant ionization stages for carbon (top panel) and hydrogen (second panel), hydrogen and electron densities (third panel), and electron temperature (bottom panel). The dashed vertical orange line indicates the location where the slab reaches n_H = 10¹⁶ cm⁻³. Middle: analog ous plot, but for a radial slab of initial n_H = 10¹⁶ cm⁻³ at the co-rotational radius and a power law dependence on disk radius extending away from the star. Right: same as the middle plot, but plotted against the log arithm of the disk radius instead of n_H. Most of the very high density and temperature structure seen in the N_H plot occurs at the corotational radius due to the high optical depth.