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Table 2
Molecular abundances on grains with respect to s-H2O in percent: observed and simulated values.
| Molecules | W33A1 | NGC 7538 | Sgr A*2 | Garrod et al. | Öberg et al. | Garrod | Model | Model | |
| IRS 92 | (2008) | (2011) | (2013) | cc-cr17-t15 | cc-cr16-t15 | ||||
|
|
|||||||||
| CO | 8 | 16 | <12 | 19 | 13 | 57 | 8.75 | 7.9 | |
| CO2 | 13 | 22 | 14 | 4.1(–3) | 13 | 18 | 0.01 | 0.005 | |
| CH4 | 1.5 | 2 | 2 | 22 | 2 | 1.9 | 35.2 | 36.6 | |
| NH3 | 15 | 13 | 20–30 | 25 | 5 | 18 | 22.7 | 23.1 | |
| H2CO | 6 | 4 | <3 | 4.3 | ≤2 | 1.6 | 0.22 | 9(–10) | |
| HCOOH | 7 | 3 | 3 | 3.2(–6) | – | – | 0.21 | 1.7(–10) | |
| CH3OH | 18 | 5 | <4 | 15 | 4 | 6.9 | 1.03 | 4.0 | |
Reference.
(2)
see Gibb et al. (2000b) for original references; a(b) refers to a × 10b throughout the manuscript.
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