Temperature gradients in the super-adiabatic layer (SAL) of a K dwarf (black) and solar model (red). The dashed and dot-dashed lines show the adiabatic gradient ∇_ad and the structural gradient ∇, respectively. The vertical dashed lines indicate the radial location of the maximum difference between the gradients, and the diagnostic inserts presents the values of this difference along with the ratio of the local density at this point between the models.