Evolution of the semi-major axis and eccentricity of a planet embedded in a radiative disk with a mass lower than that of our standard disk model. The orange curve corresponds to the same model as the orange curve in Fig. 19 with the planet started at a0 = 1.0 AU. The purple curve corresponds to a system in which the planet was embedded in the disk at a0 = 0.5 AU and moved only under the influence of the gravity of the binary. The light blue curve shows the same planet as in the purple curve, where at time t = 1700 the effect of the disk was also taken into account. The dashed line in the bottom panel shows the evolution of the planet’s mean eccentricity. The first equilibrium is reached at e ≈ 0.036, and under the action of the disk, this value of the eccentricity exponentially decreases to a new mean value of e ≈ 0.026 in a timespan of 600 years.
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