Trajectories of pebbles at the midplane region of the disk influenced by the protoplanet-induced gas flow. We set z_s = 0. The blue and red lines correspond to the trajectories of pebbles approaching from the top and bottom of this panel, respectively. The Stokes number of the pebble is set to St = 10⁻³. The gray circle at the center represents the protoplanet, and the black dashed line represents the Bondi radius.