Simulation of an FU Orionis eruption with a 1D MHD layered disk model. Left (upper): temperature profile in time from the 1D model (Simu 1); radial direction in x-axis and time in y-axis. Left (lower): temperature profile produced by the simulation for different epochs (solid colored lines); a T ∝ r^−3/4 slope is shown for comparison (solid gray line); the uncorrected profile in the innermost region (~0.01 AU, see text) is shown as a dashed line. Right: spatial morphology of the disk deduced from simulated temperature profile and compared to interferometric observations in H band (1.65 µm) and K band (2.2 µm).