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We present a sequence of toy models for irradiated planet atmospheres, inwhich the effects of geometry and energy redistribution are modelledself-consistently. We use separate but coupled grey atmosphere models to treatthe ingoing stellar irradiation and outgoing planetary reradiation. Weinvestigate how observed quantities such as full phase secondary eclipses andorbital phase curves depend on various important parameters, such as the depthat which irradiation is absorbed and the depth at which energy isredistributed. We also compare our results to the more detailed radiativetransfer models in the literature, in order to understand how those map ontothe toy model parameter space. Such an approach can prove complementary to moredetailed calculations, in that they demonstrate, in a simple way, how thesolutions change depending on where, and how, energy redistribution occurs. Asan example of the value of such models, we demonstrate how energyredistribution and temperature equilibration at moderate optical depths canlead to temperature inversions in the planetary atmosphere, which may be ofsome relevance to recent observational findings.

On the Absorption and Redistribution of Energy in Irradiated Planets