Left panel: evolution of the semi-major axis of a 1 M_J planet orbiting a 2 M_⊙ star, computed with an initial rotation on the ZAMS of Ω_ini/ Ω_crit = 0.1. The different lines correspond to different initial semi-major axis values. Only the evolutions in the last 50−60 million years are shown. Before that time, the semi-major axis remains constant. The red solid lines represent the planets that will be engulfed before the star has reached the tip of the RG branch; the blue dashed lines represent the planet that will avoid the engulfment during the RG branch ascent. The upper envelope of the green area gives the value of the stellar radius. Right panel: same as the left panel, but for an initial rotation Ω_ini/ Ω_crit = 0.5.