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Table 7
Chemical ages of the best fit models for 13CO, C18O, and N2H+.
| Chem. age | Chem. age | Chem. age | |
| of 13CO [yr] | of C18O [yr] | of N2H+ [yr] | |
|
|
|||
| CB 4 | ... | 105 | 105 |
| CB 17 | 7 × 104 | 4 × 104 | 105 |
| CB 26 | 4 × 105 | 104 | 7 × 104 |
| CB 27 | 2 × 105 | 7 × 104 | 105 |
| B 68 | 2 × 105 | 7 × 104 | 105 |
| CB 244 | 2 × 105 | 4 × 104 | 4 × 104 |
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