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Table 6
OMC-2 FIR 4 sources: Gaussian fit results, column densities and abundances for each PdBI tracer.
| Tracer | Source | T L | V LSR | FWHM | T ex a | τ | N mol | Abu. (20 K)b | Abu. (50 K)b |
| (K) | (km s-1) | (km s-1) | (K) | (1012 cm-2) | (10-12) | (10-12) | |||
|
|
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| Main | 0.37 (0.01) | 10.9 (0.1) | 11.3 (0.2) | 10–100 | 0.055–0.004 | 15.3–38.2 | 5.3–13.2 | 14.7–36.7 | |
| C34S(3–2) | West | 0.38 (0.01) | 9.3 (0.1) | 10.5 (0.2) | 10–100 | 0.040–0.003 | 8.8–22.2 | 4.7–11.9 | 13.1–33.1 |
| South | 0.15 (0.01) | 9.3 (0.2) | 10.7 (0.6) | 10–100 | 0.017–0.001 | 4.0–10.3 | 3.2–8.3 | 9.1–23.4 | |
|
|
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| Main | 0.55 (0.01) | 10.6 (0.1) | 10.0 (0.1) | 10–100 | 0.085–0.006 | 6.8–22.0 | 2.3–7.6 | 6.5–21.2 | |
| DCN(2–1) | West | 0.67 (0.01) | 9.8 (0.1) | 9.8 (0.2) | 10–100 | 0.052–0.003 | 3.7–12.5 | 2.0–6.7 | 5.5–18.7 |
| South | 0.29 (0.01) | 9.0 (0.1) | 10.2 (0.4) | 10–100 | 0.022–0.001 | 1.8–6.0 | 1.5–4.8 | 4.1–13.6 | |
|
|
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| Main | 0.19 (0.01) | 10.8 (0.2) | 6.1 (0.3) | 10–100 | 0.024–0.002 | 0.6–2.3 | 0.2–0.8 | 0.6–2.2 | |
| DCO+(2–1) | West | 0.20 (0.01) | 11.1 (0.2) | 6.3 (0.3) | 10–100 | 0.020–0.001 | 0.6–2.1 | 0.3–1.1 | 0.9–3.1 |
| South | 0.38 (0.01) | 10.3 (0.1) | 6.3 (0.2) | 10–100 | 0.044–0.003 | 1.3–4.5 | 1.0–3.6 | 3.0–10.2 | |
Notes.
(b)
Abundance determined using the dust temperature indicated in brackets to derive the total gas column density (see Table 5).
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