Density distribution of the HJ model at three different times when evolved in isolation, showing that the planet preserves its initial structure for a duration close to the planet-disruption time. The times of each profile and the ordinate scale are chosen to match the first three panels of Figure 9 to aid comparison. The time in units of the HJ’s free-fall time is also displayed in parentheses. Each black dot represents one of N_p = 12, 300 SPH particles used to resolve the planet structure. The density profile of an n = 3/2 polytrope is plotted in blue for comparison.