Fig. 4

Error of the computed dust temperatures as a function of the grid hierarchy in a model with nL = 7. From top to bottom panels: curves correspond to simulations of a point source (red curve), heating by background radiation (black curve), and simulations of dust emission when the contribution of the previous radiation sources is kept constant (blue curves). The solid and dashed lines correspond to the default and the emission-weighted simulations, respectively. The shaded regions are used to illustrate the expected 2level dependence of the noise. All calculations were done with 1.8 × 107 photon packages per frequency.
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