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Table 1

Values for the main physical parameters in our models.

Parameter Value Comment

n H 102, 103 or 104 cm-3 H nuclei pre-shock density
u 3 to 40 km s-1 Shock velocity
0.1 or 1 Dimensionless magnetic field
A v0 0.1 Buffer extinction
N0(H2) 1020 cm-2 Buffer H2 column density
N0(CO) 0 Buffer CO column density
G 0 1 External radiation field
ζ 3    × 10-17 s-1 Nominal cosmic rays flux
OPR 3 Preshock H2 ortho/para ratio

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