Gas disk evolution in the model without the burst (right-hand column) and in the models with the bursts of various duration (from left to right): t_bst = 500 yr – first column, t_bst = 200 yr – second column, and t_bst = 100 yr – third column. Four time instances starting from the onset of the burst are shown: 0.5 kyr (second row), 1.0 kyr (third row), 5.0 kyr (fourth row), and 30 kyr (bottom row). The scale bar shows the gas surface density in g cm⁻² (log units).