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Table 4
Upper limit column densities and abundance ratios for methylamine.
| Source | CH3NH2/CH3CN | CH3CN/CH3OH |
|
|
||
| Model F | 5.5E+01 | 6.3E-04 |
| Model M | 3.8E+01 | 2.6E-03 |
| Model S | 1.5E+01 | 8.6E-03 |
|
|
||
| AFGL 2591 | <5.3 | <7.5E-02 |
| G24.78 | <5.1E-01 | 2.1E-01 |
| G31.41+0.31 | <3.6 | 5.9E-02∗ |
| G75.78 | <1.9E+01 | 1.6E-02 |
| IRAS 18089-1732 | <8.9 | 1.1E-02∗ |
| IRAS 20126+4104 | <4.3E+01 | 5.2E-02 |
| NGC 7538 IRS1 | <2.5 | 6.8E-02 |
| W3(H2O) | <7.2 | 7.0E-03 |
| W 33A | <2.1 | 1.4E-01 |
|
|
||
| Sgr B2a | 1.2 | 1.5E-02 |
| Sgr B2(N)b | 3.0E-01 | 1.1E-01 |
| Sgr B2(M)b | 2.5E-01 | 6.7E-02 |
| Sgr B2(N)c | 5.9E+01 | 1.7E-02 |
| Orion Compact Ridged | – | 1.1E-02 |
Notes. Abundance ratios for methylamine. The values for CH3OH and CH3CN were taken from Bisschop et al. (2007) and Isokoski et al. (2013).
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