Comparison of mass losses as a function of β near β_d between the GRR simulations (blue points), high- (~10⁵ particles; red points) and low-resolution (~10³ particles; black points) gadget2 simulations, for γ = 5/3 (left panel) and γ = 4/3 (right panel) polytropes. For a γ = 4/3 polytrope, the value of β_d clearly depends on the adopted resolution below a resolution threshold. For a γ = 5/3 polytrope, the value of β_d differs very slightly among the three simulations.