Orbital evolution of four different size planetesimals under the effects of a nonlinear gas drag in the γ-Cephei system. Black dots correspond to mA = 1.59 M⊙ and gray to mA = 1.18 M⊙. In both cases the parameters of mB are those given by the best fits and detailed in Eqs. (20). The gaseous disk has a constant eccentricity of ef = 0.05 and a rigid retrograde precession rate with period 2π/|gg| = 1000 yr. In the lefthand panels, the orange curve shows the forced eccentricities as a function of the semimajor axis. In the righthand plots, the orange curves marks ϖ = 0.
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