Table 3
Column densities of glycolaldehyde, the two conformers of ethylene glycol, acetic acid and methanol.
| Species | Trot a | N (T = 300 K) b | Nsyntc |
|
|
|||
| Glycolaldehyde | 284 ± 27 K | 3.3 × 1016 cm-2 | 6.8 × 1016 cm-2 |
| aGg′ ethylene glycol | 344 ± 52 K | 3.3 × 1016 cm-2 | 1.1 × 1017 cm-2 |
| gGg′ ethylene glycol | 145 ± 45 K | 3.0 × 1016 cm-2 | 1.0 × 1017 cm-2 |
| Acetic acidd | ... | ... | 6 × 1015 cm-2 |
| Methanole | ... | ... | 2 × 1019 cm-2 |
Notes.
Derived rotation temperature from fit to Band 3 data (Fig. 9).
Column densities from Band 3 data assuming that T = 300 K and that the emission is uniformly extended compared to the beam.
Column density from fits of synthetic spectra to the Band 7 data assuming a source size of 0.5′′ (see also Lykke et al., in prep.) and including vibrational corrections.
From fitting synthetic spectra to the Band 6 and 7 data (Figs. B.1–B.2 and Fig. C.5) adopting an excitation temperature of 300 K.
Derived by fitting synthetic spectra of CH
OH in Band 7 as discussed in Sect. 5.1.
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