Density slices through the center of the domain for simulations with a maximum refinement level of 25 (Δx = 2.93 × 10⁻⁴AU, panel a), 26 (Δx = 1.46 × 10⁻⁴AU, panel b), and 27 (Δx = 7.34 × 10⁻⁵AU, panel c). The scale bar in panel (c) applies to the other two panels. These slices are shown at a moment when all three protostars have reached similar masses (5.9 × 10⁻³ M_⊙ for panel (a), 5.75 × 10⁻³ M_⊙ for panels (b) and (c)).