Mass of the gas ring (M_ring) for all simulations, as a function of time. Time t = 0 corresponds to the first periapsis passage. Long-short dashed black line and filled black circles: run A; solid red line and open red circles: run B; dotted ochre line and open ochre squares: run C; dashed green line and filled green squares: run D; short-dash-dotted magenta line and filled magenta triangles: run F.