Theoretical Study of Irradiation Effects in Close Binaries

Theoretical Study of Irradiation Effects in Close Binaries

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The effect of irradiation is studied in a close binary systemassuming that the secondary component is a point source, moving in a circularorbit.The irradiation effects Card Upsell are calculatedon the atmosphere of the primary component in a 3-dimensional Cartesiancoordinate geometry.In treating the reflection effect theoretically, the totalradiation $(S_mathrm{T})$ is obtained as the sum of the radiation of 1) the effect ofirradiation on the primary component which is calculated by using onedimensional rod model $(S_mathrm{r})$ and Storage Crate 2) the self radiation of the primarycomponent which is calculated by using the solution of radiative transferequation in spherical symmetry $(S_mathrm{s})$.The radiation field is estimated alongthe line of sight of the observer at infinity.

It is shown how the radiationfield changes depending on the position of the secondary component.