Time evolution of the planet’s semi-major axis (left y-axis) and planet’s core mass (right y-axis) for different initial planet locations: 2 au, 5 au, 10 au, 17.5 au, and 22 au. Black lines represent the position of the zero torque. Simulations correspond to a flat disk with a mass of M_d = 0.1 M_⊙ using α_back = 10^-3, α_dz = 10^-5, R_{in - dz} = 2.7 au and R_{out - dz} = 20 au. Simulations end when the planet achieves critical mass or after 5 Myr of viscous disk evolution.