A: Space-time diagram of the mass flux onto the individual components of the binary for model A, azimuthally averaged in the range φ₁ − π/12 ≤ φ₁ ≤ φ₁ + π/12 (a) and in the range φ₂ − π/12 ≤ φ₂ ≤ φ₂ + π/12 (b). The horizontal dashed lines indicate the orbital plane θ = π/2. The two vertical dashed lines are separated by P_orb/2 and indicate two successive times, t₁ and t₂, when the mass flux is maximum at the highest latitude. B: Mass flux toward and away from the individual cores, azimuthally averaged in the range φ₁ − π/12 ≤ φ₁ ≤ φ₁ + π/12 (a) and in the range φ₂ − π/12 ≤ φ₂ ≤ φ₂ + π/12 (b) as a function of colatitude and radius at t = t₁. C: same as B but at t = t₂. D: Surface density about the orbital plane (35) averaged over t₁ ≤ t ≤ t₂. The dashed circle indicates the approximate radial location of the overdensity responsible for the migrating accretion streams (r = 0.7). E: Density cross section in the θφ plane at r = 0.7 averaged over t₁ ≤ t ≤ t₂.