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Table 1
Parameters of the reference models.
| Model name | log n (cm-3) | log G0 |
|
|
||
| M1 | 3.0 | 3.0 |
| M2 | 3.0 | 5.0 |
| M3 | 5.5 | 3.0 |
| M4 | 5.5 | 5.0 |
Notes. These are identical to the ones in Meijerink & Spaans (2005). M1 and M2 correspond to low density clouds in galactic centers in the presence of a starburst event, whereas M3 and M4 correspond to much denser clouds where excitation of high density gas tracers such as HCN is possible.
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