Density distribution simulations of the companion star using a 3.5 M_⊙ B-star MS model with different initial binary separations. Only the bound material that originally belonged to the companion star and final accreted ejecta are shown. The logarithm of density is color-coded. The top-left panel shows the initial configuration for all three cases. The motion of the incoming SN ejecta is from right to left. The following three panels (for initial orbital separations of a/R₂ = 2.55, 5.10 and 10.20, respectively) show snapshots of the mass density at the moment that the removed companion mass, the resulting impact velocity, and the contamination from the SN ejecta, have converged to (almost) constant values. In the widest system (lower-left panel), the impacted star is not significantly inflated compared to its initial state before the SN impact. The white curves show constant density contours (log₁₀ρ = −2.0).