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Fig. 17
Model predictions for different values of ζCR (and fixed G0 = 103, nH = 105, 106 cm−3, and AV, tot = 15 mag). Continuous curves show the column density enhancement N∕N0 with respect to the models with ζCR,0 = 2 × 10−17 s−1 (roughly theionization rate in disk GMCs).
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