Table 5
Results from our LTE model of molecular emission in the SMA spectra.
| Molecule | T rot | N | T vib |
| [K] | [cm-2] | [K] | |
|
|
|||
| CO (SC) | 80* | >1 × 1020 | |
| CO (RC) | 80* | 5 ± 1 × 1018 | |
| C34S | 80* | 5 ± 1 × 1015 | |
| HNC v = 0 | 80* | 8 ± 4 × 1015 |
 350 ± 40
|
| HNC v2 = 1 | 80* | 2 ± 1 × 1015 | |
| HC3N v = 0 | 80* | 7 ± 2 × 1016 |
315 ± 30
|
| HC3N v6 = 1 | 310 ± 50 | 3.6 ± 2 × 1015 | |
| HC3N v7 = 1 | 160 ± 30 | 6 ± 3 × 1015 | |
| HC3N v7 = 2 | 160* | 4 ± 2 × 1015 | |
Notes. For HC 3N v6 = 1 and v7 = 1, the excitation temperature was calculated with the population diagram method. The excitation temperature was fixed at 80 K for species with only one observed transition, while for HC3N v7 = 2 the rotational temperature was fixed at the value derived for HC3N v7 = 1 (160 K). The fixed parameters in the fit are marked with asterisks. Vibrational temperatures derived for HNC and HC3N transitions are also shown. Uncertainties on the excitation temperatures are Monte Carlo estimates. See Sect. 4.2.1 for a discussion. Because of the many uncertainties and assumptions involved, we advise extreme caution when interpreting temperatures and column densities derived by LTE models. Please see Sect. 4.2.3 for a discussion.
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