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Table 4

CH3NH2 column density ratios.

CH3NH2 /CH2NH CH3NH2/NH2CHO CH3NH2/CH3CN References

CH3CN reference 13C 15N
MM1 II ≥5.2 38 1.28 1.94 This work
MM2 I ≥1.2 8.16 0.71 0.70 This work
MM3 I ≥3.0 ≥60 0.54 0.31 This work

Model F 7.27 20.5 16.3 1
Model M 1.5 24 17.1 1
Model S 0.45 2.34 5.23 1

Sgr B2(M) 31(a) 3.21 0.25 2
Sgr B2(N) 0.75 0.44 0.31 2
Sgr B2(N) 7.14 2.08 35.7 3
Sgr B2(N) 5.49 4
Orion KL Hot Core ≤2.86 ≤3.13 5

IRAS 16293–2422B ≤0.88 ≤0.053 ≤0.013 6, 7

Comet 67P(b) ≤0.33 ≤2 8

Notes. The uncertainty on the column density ratios derived towards NGC 6334 I is estimated to be 40% (see Sect. 2). (a) Extended CH2NH emission. (b)Listed as upper limits based on the discussion in Sect. 2.4 of Altwegg et al. (2017).

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