Table 3
Column densities and abundance ratios.
| Region (age) (yr) | Tex (K) | N(CH2OHCHO) (30 K) (1013 cm−2) | CH2OHCHO/H (30 K) (10−9) | GA/ethanol (Tex=20, 30, 50, 100) |
|---|---|---|---|---|
| B0 (900) | >20 | 1.4 ± 0.2 | 7.0 ± 3.5 | 0.40 ± 0.10, 0.32 ± 0.07, 0.25 ± 0.06, 0.18 ± 0.04 |
| B1 (1500) | >11 | 1.2 ± 0.2 | 6 ± 3 | 0.29 ± 0.07, 0.23 ± 0.05, 0.18 ± 0.05, 0.13 ± 0.03 |
| B2 (2300) | >17 | 2.3 ± 0.3 | 12 ± 6 | 0.55 ± 0.12, 0.44 ± 0.09, 0.33 ± 0.07, 0.24 ± 0.05 |
Notes. First column lists the region and, in parenthesis, the age of the shocked regions, where an error of 250 yr has to be considered; second, third and fourth columns report the lower limit to Tex, and the GA column density N(CH2OHCHO) and abundance CH2OHCHO/H, calculated assuming Tex=30 K (see text); last column lists the abundance ratio GA/Ethanol obtained assuming the same Tex for the two species and computed for Tex=20, 50 and 100 K, respectively.
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