Trajectories of pebbles without wind erosion (top) and with wind erosion (bottom). The planet in the center has Earth’s radius (R_planet = 1 R_Earth) and is located at a = 1 AU. The initial pebble radius is R_pebble = 1 m. The surface energy of the millimeter-sized particles that are constituents of the larger pebble is assumed to be γ = 10⁻⁴ N m⁻¹. The diameter of the pebbles is shown with the color of the trajectories (red: 2 m, blue: 1 mm). The rapid transition in the case of erosion occurs in the little white gap. For visualization reasons, we chose not to plot the sizes in between.