Table 3
Abundances of water vapour (XH2O), water ice (Xs - H2O), atomic oxygen (XO), and the sum of these three species (XO,SWaN) after various pre-collapse times tpre as predicted from the dark cloud model with Tdust = 10 K, AV = 10 mag, nH = 2 × 104 cm-3 (W13).
| t pre | X H2O | X s - H2O | X O | X O,SWaN |
| (Myr) | (ppm) | (ppm) | (ppm) | (ppm) |
|
|
||||
| 0.01 | 0.1 | 1.9 | 312.8 | 314.8 |
| 0.1 | 0.3 | 19.4 | 250.0 | 269.7 |
| 1.0 | 0.2 | 102.3 | 61.2 | 163.7 |
| 10.0 | 0.1 | 226.7 | 2.3 | 229.1 |
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