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Fig. 18

image

Results for the wavelength-dependent planet radius of HAT-P-32Ab from Run 2 (circles) compared with several different theoretical atmosphere models. Top panel: unmodified solar composition model at thermochemical equilibrium (green) and the same model with the titanium oxide (TiO) abundance enhanced in the upper layers of the atmosphere (gray dashed). Middle panel: models with selective alkali metal abundance depletion. In one model, only the sodium abundance was reduced by a factor of 1000 (magenta) and in the other only the potassium abundance was reduced by a factor of 1000 (blue dashed). Bottom panel: model where both the sodium and potassium abundance were reduced by a factor of 1000 (red) and the median average of the radius ratio values (blue dash-dotted).

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