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Table 12
Critical density, and percentage of total flux originating from gas in filaments and dense cores for each line.
| Species | Transition | n crit |
|
|
| cm-3 | % of Ftot | % of Ftot | ||
|
|
||||
|
1−0 | 2 × 103 | 38 | 7.6 |
|
1−0 | 2 × 103 | 45 | 15 |
| HCO+ | 1−0 | 2 × 105 | 40 | 16 |
| C2H | 1−0 | 1 × 105 | 37 | 17 |
| c - C3H2 | 2−1 | 1 × 106 | 38 | 17 |
| HCN | 1−0 | 3 × 106 | 44 | 18 |
| 12CN | 1−0 | 3 × 105 | 45 | 19 |
| C17O | 1−0 | 2 × 103 | 43 | 26 |
| HNC | 1−0 | 4 × 105 | 41 | 27 |
| C18O | 1−0 | 2 × 103 | 48 | 29 |
|
2−1 | 2 × 105 | 44 | 31 |
|
2−1 | 2 × 105 | 42 | 32 |
| CH3OH | 2−1 | 3 × 104 | 41 | 48 |
| H13CO+ | 1−0 | 2 × 105 | 34 | 56 |
| N2H+ | 1−0 | 2 × 105 | 17 | 88 |
Notes. The lines are sorted by increasing value of 
(last column). The typical volume density of the regions with 
, and 
are 1500, and 7300 H2 cm-3, respectively.
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