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Table 5
12C/13C ratios for different molecules (C3, C2, C, CO, CN, HCN, and HNC) for three different times in the fiducial model: the early chemistry time (second row), t1, as defined in the text, and the times before and after t1 that we have discussed in the text (first and third rows, respectively).
| Time | 12C/13C | ||||||
|---|---|---|---|---|---|---|---|
| C3 | C2 | C | CO | CN | HCN | HNC | |
| 3 × 104 yr | 6 | 68 | 163 | 35 | 50 | 88 | 106 |
| t1 = 1.6 × 105 yr | 7 | 24 | 211 | 63 | 65 | 68 | 76 |
| 3 × 105 yr | 6 | 11 | 81 | 64 | 57 | 50 | 79 |
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