Table 3
[13C II] integrated intensity and minimum column density, [12C II] minimum column density scaled-up using α and equivalent extinction. [12C II] integrated intensity, minimum column density assuming optically thin emission and equivalent visual extinction.
| [13C II] | Optically thin [12C II] | Ratio | ||||||
|---|---|---|---|---|---|---|---|---|
| Positions | [13C II] Int. | Nmin([13C II]) | Nmin([C II])(a) | Av,min(b) | [12C II] Int. | Nmin([C II])(c) | Av,min(d) |  |
| Intensity | [13C II] | [13C II] | intensity | [12C II] | [12C II] | |||
| (K km s−1) | (cm−2) | (cm−2) | (mag) | (K km s−1) | (cm−2) | (mag) | ||
| M43 Pos. 0 | 5.5 | 2.5E16 | 1.7E18 | 7.4 | 283.1 | 1.3E18 | 5.6 | 1.3 |
| M43 Pos. 1 | 4.3 | 1.9E16 | 1.3E18 | 5.7 | 249.2 | 1.1E18 | 4.9 | 1.2 |
| M43 Pos. 2 | 2.6 | 1.2E16 | 7.7E17 | 3.4 | 172.2 | 7.7E17 | 3.4 | 1.0 |
| M43 Pos. 3 | 2.6 | 1.1E16 | 7.6E17 | 3.4 | 134.0 | 6.0E17 | 2.6 | 1.3 |
| M43 Pos. 4 | 5.5 | 2.5E16 | 1.7E18 | 7.4 | 270.1 | 1.2E18 | 5.3 | 1.4 |
| M43 Pos. 5 | 3.7 | 1.6E16 | 1.1E18 | 4.9 | 227.4 | 1.0E18 | 4.5 | 1.1 |
| M43 Pos. 6 | 4.1 | 1.8E16 | 1.2E18 | 5.4 | 237.9 | 1.1E18 | 4.7 | 1.1 |
| HOR Pos. 0 | 1.2 | 5.3E15 | 3.6E17 | 1.6 | 39.6 | 1.8E17 | 0.8 | 2.0 |
| HOR Pos. 1 | 0.7 | 3.1E15 | 2.1E17 | 0.9 | 11.2 | 5.0E16 | 0.2 | 4.2 |
| HOR Pos. 2 | 1.4 | 6.1E15 | 4.1E17 | 1.8 | 26.6 | 1.2E17 | 0.5 | 3.4 |
| HOR Pos. 3 | 1.0 | 4.7E15 | 3.1E17 | 1.4 | 25.7 | 1.1E17 | 0.5 | 2.7 |
| HOR Pos. 4 | 0.3 | 1.2E15 | 8.4E17 | 0.4 | 14.8 | 6.6E16 | 0.3 | 1.3 |
| HOR Pos. 5 | 0.9 | 3.9E15 | 2.6E17 | 1.2 | 14.7 | 6.5E16 | 0.3 | 4.0 |
| HOR Pos. 6 | 1.6 | 7.0E15 | 4.7E17 | 2.1 | 41.5 | 1.9E17 | 0.8 | 2.5 |
| MonR2 Pos.1 | 12.2 | 5.5E16 | 3.7E18 | 16.3 | 410.8 | 1.8E18 | 8.1 | 2.0 |
| MonR2 Pos. 2 | 11.4 | 5.1E16 | 3.4E18 | 15.2 | 477.0 | 2.1E18 | 9.5 | 1.6 |
| M17SW Pos. 0 | 41.6 | 1.9E17 | 7.4E18 | 33.0 | 657.2 | 2.9E18 | 13.1 | 2.5 |
| M17SW Pos. 1 | 39.1 | 1.7E17 | 7.0E18 | 31.1 | 460.1 | 2.1E18 | 9.1 | 3.4 |
| M17SW Pos. 2 | 26.9 | 1.2E17 | 4.8E18 | 21.3 | 458.1 | 2.0E18 | 9.1 | 2.3 |
| M17SW Pos. 3 | 16.5 | 7.4E16 | 2.9E18 | 13.1 | 489.9 | 2.2E18 | 9.7 | 1.3 |
| M17SW Pos. 4 | 45.1 | 2.0E17 | 8.1E18 | 35.9 | 722.7 | 3.2E18 | 14.4 | 2.5 |
| M17SW Pos. 5 | 14.1 | 6.3E16 | 2.5E18 | 11.2 | 521.7 | 2.3E18 | 10.4 | 1.1 |
| M17SW Pos. 6 | 34.3 | 1.5E17 | 6.1E18 | 27.3 | 617.7 | 2.8E18 | 12.3 | 2.2 |
Notes. For the derivation of the values, we have used more digits than the one presented here. (a) [12C II] column density derived from the scaled-up [13C II] column density. (b) [12C II] equivalent visual extinction derived from the scaled-up [13C II] column density by α+ corresponding to each source. (c) [12C II] column density derived directly from the [12C II] integrated intensity assuming optically thin regime. (d) [12C II] equivalent visual extinction derived directly from the [12C II] integrated intensity assuming optically thin regime.
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