Dynamical friction in an infinite, homogeneous, and isotropic medium calculated from the Chandrashekhar method (grey solid line) and our method (blue circles). The vertical bars in all the panels depict the dynamical friction changes in the vicinity of 50 pc from the perturber. We note that they do not describe error or uncertainty. The dynamical friction dependency on the mass (left panel), velocity (central panel), and velocity dispersion (right panel) is recovered.