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Table 4
Time ranges (in kyr) that are needed fit observed abundances in the lower abundance sources, B1/B2, those for the higher abundance source, B3, at a cosmic-ray ionization rate of 1 × 10−16 s−1 in a fast warm up.
| Density | B1/B2 | B3 | ||
|---|---|---|---|---|
| Time range | Tgas | Time range | Tgas | |
| (cm−3) | (kyr) | (K) | (kyr) | (K) |
| 107 | 19–22.75 | 74–101 | 21.25–25 | 90–123 |
| 108 | 20–23 | 81–105 | 21.9–25.4 | 96–127 |
| 109 | 22.3–23.6 | 99–110 | 22.7–26 | 108–132 |
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