Snapshots of the dust temperature as a function of the radius in simulations M_TD, M_10, and M_0 at the time when the central density of the core hits either n(H₂) = 10⁵ cm⁻³ (upper left-hand panel) or n(H₂) = 10⁷ cm⁻³ (upper middle panel). As in Fig. 1, the lower panels show the difference between the temperatures for clarity. The right-hand panel displays the volume density profile at the two central density values in simulation M_TD; the corresponding profiles in simulations M_10 and M_0 are only marginally different to those shown here.