Left: total abundance of all aromatic molecules obtained in the model with CTM. Gas-phase abundances are shown by dashed lines, solid-phase abundances are shown by dotted lines, and the sum abundance is shown by solid lines. Red, black, and blue colors illustrate the models with E_d = 2, 3 and 4 eV, respectively. Right: ratio between the total abundance of all aromatic molecules obtained in the models with the surface acetylene CTM and without it. The designation “GR+SR” means the model with CTM, while the designation “GR” indicates the model without it. The ratio of gas-phase abundances is illustrated by solid lines, while the ratio of solid-phase abundances is shown by dotted lines. The colors correspond to the same models as in the left panel.