Table 1.
Column densities for relevant O-bearing species in TMC-1.
| Molecule | N(a) | Trot(b) | X(c) |
|---|---|---|---|
| C2O | (7.5 ± 0.3) × 1011 | 7−10.0 (d) | 7.5 × 10−11 |
| C3O | (1.2 ± 0.2) × 1012 | 7.0 ± 1.0 | 1.2 × 10−10 |
| C4O | ≤9.0 × 1010 | 10.0 | ≤9.0 × 10−12 |
| C5O | (1.5 ± 0.2) × 1010 | 10.0 ± 0.5 | 1.5 × 10−12 |
| C6O | ≤1.1 × 1011 | 10.0 | ≤1.1 × 10−11 |
| HCO | (1.1 ± 0.1) × 1012 | 7.0 | 1.1 × 10−10 |
| HC2O | (7.7 ± 0.7) × 1011 | 7.0 | 7.7 × 10−11 |
| HC3O | (1.3 ± 0.2) × 1011 | 7.0 | 1.3 × 10−11 |
| HC4O | ≤9.0 × 1010 | 10.0 | ≤9.0 × 10−12 |
| HC5O | (1.4 ± 0.2) × 1012 | 10.0 | 1.4 × 10−10 |
| HC6O | ≤1.8 × 1011 | 10.0 | ≤1.8 × 10−11 |
| HC7O | (6.5 ± 0.5) × 1011 | 10.0 | 6.5 × 10−11 |
Notes.
Rotational temperature. When the uncertainty is not provided, it corresponds to an assumed value.
Relative abundance to H2, assuming a total column density of molecular hydrogen of 1022 cm−2 (Cernicharo & Guélin 1987).
Column density derived from a large velocity gradient model (see Appendix C.1).
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