Migration of a planet pair in the gaseous disk. Black lines trace the time evolution of the semi-major axes of the planets and the blue dashed line represents the inner magnetospheric radius r_c. The four panels show simulations with a) default parameters; b) massive inner planet; c) strong stellar magnetic field and d) a light disk. Parameters are listed in Table 1. Vertical lines represent the time when the inner (t₁) and the outer planet (t₂) enter the cavity. We would like to note that the scale of the x-axis of panel d) is different from the others.