Resulting shock type as a function of UV radiation field strength, preshock density, shock velocity, and magnetic field strength for a subset of the grid (for brevity, the shock velocities 2, 3, 4, 15, 25, and 50 km s⁻¹ are not shown). The cell color denotes the shock type, where blue is for J-type shocks, orange is for C-type shocks, red is for CJ-type shocks, and green is for C*-type shocks, as is also written in each cell. The figure shows model results for ζ_H2 = 10⁻¹⁷ s⁻¹, X(PAH) = 10⁻⁶. White cells are for models that did not converge numerically.