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Table 2
Model components and source-averaged column densities.
| Comp. | Radius | Tk (K) | n(H2) (cm-3) |
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| Hot | ~500 AU | 800 | 5 × 106 |
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| N(cm-2) | 12CO(5 × 1016) | H2O(2 × 1016) | |
| 13CO(9 × 1014) | |||
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| Warm | ~500 AU | 375 | 5 × 106 |
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| N(cm-2) | 12CO(1 × 1018) | 13CO(2 × 1016) | |
| OH(1 × 1016) | HCO+(5 × 1014) | ||
| HCN(2 × 1014) | CH+(<2 × 1014) | ||
| CO+(<2 × 1015) | NH3(<2 × 1015) | ||
| O(1 × 1018) | |||
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| Cool | ~4500 AU | 140 | 2 × 105 |
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| N(cm-2) | 12CO(1 × 1017) | H2O(8 × 1015) | |
| 13CO(1 × 1016) | HCO+(2 × 1014) | ||
| HCN(1 × 1015) | C(1 × 1017) | ||
| C+(1 × 1016) | |||
Notes. We assume a line-width of 20 km s-1 in all components.
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