Top (bottom) panel: mass of stars (gas) initially bound to the satellite galaxy that lie(s) at a distance >50 kpc both from the centre of the S0 galaxy and from the centre of the satellite galaxy, as a function of time. M_{∗ , out} (M_{g, out}) can be considered as the mass of the stellar (gaseous) halo of the S0 galaxy. 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; long-dash-dotted blue line and blue asterisks: run E; short-dash-dotted magenta line and filled magenta triangles: run F.