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Table 4
Abundance ratio 
/XC18O in the six distinct
regions.
| T ex 13CO | T ex C18O |
|
φ C18O | Orion Bar | DLSF | OMC-1 | OMC-2/3 | OMC-4 | Bending structure |
|
|
|||||||||
| T CO peak | T CO peak | 1.0 | 1.0 | 16.58 ± 0.17 | 15.83 ± 0.14 | 12.14 ± 0.04 | 12.92 ± 0.04 | 11.64 ± 0.05 | 11.68 ± 0.04 |
| T CO peak | T CO peak | 1.0 | 0.8 | 13.25 ± 0.14 | 12.61 ± 0.12 | 9.68 ± 0.03 | 10.26 ± 0.03 | 9.25 ± 0.04 | 9.25 ± 0.03 |
| T CO peak | T CO peak | 0.8 | 0.8 | 16.90 ± 0.18 | 16.80 ± 0.16 | 12.53 ± 0.04 | 14.06 ± 0.04 | 12.46 ± 0.05 | 12.61 ± 0.04 |
| 30 K | 20 K | 1.0 | 1.0 | 27.45 ± 0.25 | 22.82 ± 0.21 | 20.23 ± 0.07 | 18.78 ± 0.06 | 16.25 ± 0.08 | 14.12 ± 0.05 |
| 30 K | 20 K | 1.0 | 0.8 | 21.79 ± 0.20 | 18.09 ± 0.17 | 15.99 ± 0.05 | 14.76 ± 0.05 | 12.81 ± 0.06 | 11.18 ± 0.04 |
| 30 K | 20 K | 0.8 | 0.8 | 30.27 ± 0.28 | 25.14 ± 0.25 | 24.31 ± 0.11 | 22.17 ± 0.07 | 18.08 ± 0.10 | 14.59 ± 0.06 |
|
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| Number of pixels | 108 | 371 | 2673 | 5487 | 2150 | 5061 | |||
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