Table 3
Column density ratios with CH3OH as reference.
| CH3NH2/CH3OH | NH2CHO/CH3OH | CH3CN/CH3OH | References | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 13CH3CN | CH3C15N | ||||||||
| CH3OH reference | 13C | 18O | 13C | 18O | 13C | 18O | 13C | 18O | |
| MM1 II | 5.9 × 10−3 | 2.5 × 10−3 | 1.5 × 10−4 | 6.5 × 10−5 | 4.6 × 10−3 | 2.0 × 10−3 | 3.0 × 10−3 | 1.3 × 10−3 | This work |
| MM2 I | 1.5 × 10−3 | 9.2 × 10−4 | 1.9 × 10−4 | 1.1 × 10−4 | 2.1 × 10−3 | 1.3 × 10−3 | 1.9 × 10−3 | 1.1 × 10−3 | This work |
| MM3 I | 5.4 × 10−4 | 4.8 × 10−4 | ≤9.0 × 10−6 | ≤7.9 × 10−6 | 1.0 × 10−3 | 8.9 × 10−4 | 1.7 × 10−3 | 1.5 × 10−3 | This work |
| Model F | 7.3 × 10−3 | 0.04 | 4.5 × 10−4 | 1 | |||||
| Model M | 4.0 × 10−3 | 0.02 | 2.3 × 10−4 | 1 | |||||
| Model S | 1.8 × 10−3 | 0.76 | 3.4 × 10−4 | 1 | |||||
| Sgr B2(M) | 8.0 × 10−3 | 2.5 × 10−3 | 0.03 | 2 | |||||
| Sgr B2(N) | 0.03 | 0.07 | 0.11 | 2 | |||||
| Sgr B2(N) | 0.10 | 0.04 | 2.8 × 10−3 | 3 | |||||
| Sgr B2(N2–5)(a) | – | 8.3 × 10−3 – 0.09(b) | 0.06 – 0.13 | 4 | |||||
| Orion KL Compact Ridge | – | 1.7 × 10−3 | 0.01 | 5 | |||||
| IRAS 16293–2422B | ≤5.3 × 10−5 | 10−3 | 4 × 10−3 | 6, 7, 8, 9 | |||||
Notes. The uncertainty on the column density ratios derived towards NGC 6334 I is estimated to be 40% (see Sect. 2). (a) Range of values derived for the cores N2, N3, N4, and N5. (b)Excluding the upper limit on NH2CHO for N4.
References. (1) Garrod (2013); (2) Belloche et al. (2013); (3) Neill et al. (2014); (4) Bonfand et al. (2017); (5) Crockett et al. (2014); (6) Coutens et al. (2016); (7) Ligterink et al. (2018); (8) Jørgensen et al. (2018); (9) Calcutt et al. (2018).
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