Theoretical atmospheric structure obtained for WASP-178b. Top: HELIOS (dashed orange line) and CLOUDY (NLTE; dashed cyan line) TP profiles. The solid black line shows the composite TP profile. The horizontal dotted black line indicates the location of the continuum according to the HELIOS model. The horizontal dash-dotted red line gives the location of CLOUDY’s upper-density limit of 10¹⁵ cm⁻³. The dashed dark green line shows the CLOUDY TP profile computed assuming LTE. Bottom: Pressure (black; left y-axis) and temperature (red; right y-axis) composite theoretical profiles as a function of the planetary polar radius. For context, the L 1 point lies at about 4.00 R_p, while the Roche radius in the limb direction lies at about 2.67 R_p.