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Table 1
Characteristics of the analyzed ice samples (composition, mixing ratios, methylamine column density, and temperature range).
| Mixture | Mixing | N |
Temperature |
|---|---|---|---|
| ratios | (1017 cm−2) | range (K) | |
| CH3NH2:H2O | 1:5 | 4.5 ± 0.6 | 15–150 |
| CH3NH2:H2O | 1:10 | 2.5 ± 0.3 | 15–150 |
| CH3NH2:H2O | 1:20 | 1.3 ± 0.2 | 15–150 |
| CH3NH2:CH4 | 1:5 | 3.7 ± 0.5 | 15–45 |
| CH3NH2:CH4 | 1:10 | 2.0 ± 0.3 | 15–45 |
| CH3NH2:CH4 | 1:20 | 1.0 ± 0.1 | 15–45 |
| CH3NH2:NH3 | 1:5 | 4.4 ± 0.6 | 15–115 |
| CH3NH2:NH3 | 1:10 | 2.4 ± 0.3 | 15–115 |
| CH3NH2:NH3 | 1:20 | 1.3 ± 0.2 | 15–115 |
| CH3NH2:H2O:CH4 | 1:5:5 | 2.2 ± 0.4 | 15–150 |
| CH3NH2:H2O:CH4 | 1:10:10 | 1.2 ± 0.2 | 15–150 |
| CH3NH2:H2O:NH3 | 1:5:5 | 2.5 ± 0.4 | 15–150 |
| CH3NH2:H2O:NH3 | 1:10:10 | 1.3 ± 0.2 | 15–150 |
| CH3NH2:CH4:NH3 | 1:5:5 | 2.2 ± 0.4 | 15–115 |
| CH3NH2:CH4:NH3 | 1:10:10 | 1.2 ± 0.2 | 15–115 |
| CH3NH2:H2O:CH4:NH3 | 3:10:10:10 | 2.3 ± 0.4 | 15–150 |
Notes. For more information on the uncertainty of the ice mixtures, see Sect. 2.1.
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