Specific entropy s and density ρ slices of the simulation with the BH companion at t  =  8244 d. The quantities are shown to the left (x ≤ 0 for the spec. entropy) and right (x ≥ 0 for the density) in an edge-on view (x − z) in (b), respectively. Furthermore, the distribution of all cells along the z-direction in a cylindrical shell (indicated by the dashed rectangle) in (a) and (c). The gray streamlines in (b) show the velocity field in the x − z plane.