Example of a simulation of the dynamics of the β Pic planetary system with four planets, β Pic b (red), β Pic c (blue) and two additional planets (green and orange), and the disk of planetesimals (black). The initial orbital parameters of β Pic b and c are taken from Table 1. In this example, the additional planets have a mass of 0.05 M_Jup, an initial eccentricity of 0.05, and initial semi-major axes of 30 and 40 au respectively. The plotting conventions are identical to Fig. 1.