Equatorially averaged (i.e. the zonal-mean at the equator) T–P profiles (orange) for three models of KELT-1b with different horizontal convergence pressures (P_converge), and no radiative forcing, via Newtonian cooling, for P > P_converge. From top to bottom: the convergence pressure of each model is 1 bar, 10 bar, and 40 bar, respectively. In these plots, the equilibrium Newtonian cooling profile is shown in grey, the day-side profile is shown in red, and the night-side profile in shown in blue.