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Table 4
Summary of the different parameters required to determine the velocity of the dissociation front, vDF (see Eq. (10)), and the advection timescale, Tad.
| PDR | G0 | nH [H cm−3] | L [pc] | vDF [km s−1] | τad [yr] |
|---|---|---|---|---|---|
| IC63 | 1100 ± 100 | (2 ± 0.2) × 104 | (8 ± 0.05) × 10−3 | 0.39 ± 0.081 | (2 ± 0.4) × 104 |
| Horsehead | 100 ± 10 | (1 ± 0.5) × 104 | (7 ± 2.5) × 10−3 | 0.07 ± 0.038 | (5 ± 3) × 104 |
| Orion Bar | (2.6 ± 1.5) X 104 | (4 ± 0.1) × 104 | (1 ± 0.01) × 10−2 | 4.6 ± 2.6 | (1.8 ± 1) × 103 |
Notes. The details on the calculation of the advection timescale uncertainties can be found in Appendix F.
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