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Extrasolar planets are a natural extension of the interacting binariestowards the companions with very small masses and similar tools might be usedto study them. Unfortunately, the generally accepted treatment of thereflection effect in interacting binaries is not very suitable to study coldobjects irradiated by hot objects or extrasolar planets. Our simple model ofthe reflection effect takes into account the reflection (scattering), heatingand heat redistribution over the surface of the irradiated object. The shape ofthe objects is described by the Roche potential and limb and gravity darkeningcan be taken into account. The orbital revolution and rotation of the planetwith proper Doppler shifts for the scattered and thermal radiation are alsoaccounted for. Subsequently, light-curves and/or spectra of exoplanets weremodeled and the effects of the heat redistribution, limb darkening/brightening,(non-)grey albedo, and non-spherical shape were studied. Recent observations ofHD189733b, WASP12b, and Wasp-19b were reproduced reasonably well. HD189733b haslow Bond albedo and intense heat redistribution. Wasp-19b has low Bond albedoand low heat redistribution. We also calculate the exact Roche shapes andtemperature distribution over the surface of all 78 transiting extrasolarplanets known so far. It is found that the departures from the sphere varyconsiderably within the sample. Departures of about 1% are common. In somecases: WASP-12b, WASP-19b, WASP-33b departures can reach about 14, 12, and 8%,respectively. The mean temperatures of these planets also vary considerablyfrom 300 K to 2600 K. The extreme cases are WASP-33b, WASP-12b, and WASP-18bwith mean temperatures of about 2600, 2430, and 2330 K, respectively.

A simple model of the reflection effect for the interacting binaries and extrasolar planets