Density snapshots in models 2 and 3 for which case a non-migrating giant planet is embedded in a disk with α_visc = 5 × 10^-3 (panel a)) and 5 × 10^-5 (panel b)). In each panel the left and right columns correspond to simulations in which the indirect potential is taken into account (model 2+ and 3+) and neglected (model 2 and 3), respectively. Snapshots are taken after the gap is opened at t = 10³ yr corresponding to about 100th orbits (upper row), while at the end of simulation at t = 4 × 10⁴ yr corresponding to about 3600th orbits (lower row).