Table 5
Results from the population diagrams, sorted according to the molecular fractional abundance (relative to H2) in descending order.
| Molecule | Trot | Column density | Abundance | θs | Lit. observational f(X) | Ref. | Lit. chemical model f(X) | Ref. |
| (K) | (cm-2) | − | ′′ | − | − | − | − | |
|
|
||||||||
| CO | 18 (4) | ≳1.3 (0.3) × 1017 | ≳1.1 × 10-4 | 18 | [2–3] × 10-4 | d, f | 7 × 10-4–1 × 10-3 | γ |
| 13CO | 21 (8) | 1.6 (0.6) × 1016 | 1.4 × 10-5† | 18 | [1–3] × 10-5 | d, f | − | − |
| SO2 cold | 40 (2) | >1.1 (0.1) × 1016‡ | >9.6 × 10-6‡ | 2‡ | 2 × 10-6–1 × 10-5 | b, f | 2 × 10-7 | ϵ |
| SiO | 17 (2) | >9.1 (3.3) × 1015 | >8.0 × 10-6 | 2 | 4 × 10-7–2 × 10-5 | e, d | 2 × 10-5–9 × 10-5 | γ |
| SO | 17 (1) | ≳8.9 (1.6) × 1015 | ≳7.8 × 10-6 | 2 | 3 × 10-7–3 × 10-6 | f, a | 2 × 10-12–9 × 10-7 | γ, ϵ |
| SiS | 64 (5) | 5.2 (0.6) × 1015 | 4.6 × 10-6 | 2 | 8 × 10-9–1 × 10-5 | d | 8 × 10-10–3 × 10-6 | β, ϵ |
| SO2 warm | 290 (60) | >3.1 (1.0) × 1015‡ | >2.7 × 10-6‡ | 2‡ | − | − | 2 × 10-14–4 × 10-9 | γ |
| 29SiO | 17 (2) | ≳2.1 (0.6) × 1015 | ≳1.8 × 10-6 | 2 | − | − | − | − |
| PO | 17 (2) | 2.0 (0.4) × 1015 | 1.7 × 10-6 | 0.7 | 5 × 10-8–6 × 10-7 | c | 2 × 10-10–1 × 10-7 | γ |
| 30SiO | 17 (2) | ≳1.5 (0.5) × 1015 | ≳1.3 × 10-6 | 2 | − | − | − | − |
| H2S | 39 (3) | 1.4 (0.3) × 1015 | 1.2 × 10-6 | 2 | − | − | 6 × 10-13–3 × 10-5 | β, γ |
| 34SO2 | 35 (6) | 1.1 (0.3) × 1015 | 9.6 × 10-7 | 2 | − | − | − | − |
| CS | 25 (2) | 9.2 (1.0) × 1014 | 8.0 × 10-7 | 2 | 8 × 10-8–3 × 10-7 | f, g | 2 × 10-11–2 × 10-5 | γ, β |
| 34SO | 14 (1) | 8.9 (2.4) × 1014 | 7.8 × 10-7 | 2 | − | − | − | − |
| PN | 18 (2) | 8.3 (1.7) × 1014 | 7.3 × 10-7 | 0.7 | 3 × 10-7 | c | 4 × 10-10–6 × 10-7 | γ |
| HCN | 10 (1) | >7.6 (2.9) × 1014 | >6.6 × 10-7 | 4 | 4 × 10-7–1 × 10-6 | i, f | 6 × 10-12–3 × 10-4 | γ, β |
| 29SiS | 78 (5) | 4.9 (0.4) × 1014 | 4.3 × 10-7 | 2 | − | − | − | − |
| Si34S | 70 (10) | 4.5 (0.8) × 1014 | 3.9 × 10-7 | 2 | − | − | − | − |
| NaCl | 67 (7) | 3.5 (0.6) × 1014 | 3.1 × 10-7 | 0.3 | 4 × 10-9 | h | 4 × 10-12–1 × 10-8 | γ |
| 30SiS | 83 (9) | 3.5 (0.5) × 1014 | 3.1 × 10-7 | 2 | − | − | − | − |
| H2CO | 10 (2) | 2.8 (0.5) × 1014 | 2.4 × 10-7 | 2 | − | − | 1 × 10-9–5 × 10-7 | α, ϵ |
| CN | 9 (2) | 1.5 (0.7) × 1014 | 1.3 × 10-7 | 6 | 2 × 10-10–2 × 10-7 | d, f | 3 × 10-13–3 × 10-7 | β, δ |
| Si18O | 24 (8) | 1.5 (0.8) × 1014 | 1.3 × 10-7 | 2 | − | − | − | − |
| Si17O | 12 (2) | 1.0 (0.4) × 1014 | 8.7 × 10-8 | 2 | − | − | − | − |
| 13CS | 34 (3) | 9.6 (0.8) × 1013 | 8.4 × 10-8 | 2 | − | − | − | − |
| H13CN | 11 (2) | 9.2 (2.5) × 1013 | 8.0 × 10-8 | 4 | − | − | − | − |
| C34S | 24 (1) | 6.9 (0.6) × 1013 | 6.0 × 10-8 | 2 | − | − | − | − |
| NS | 18 (2) | 2.6 (0.5) × 1013 | 2.3 × 10-8 | 6 | − | − | 7 × 10-13–8 × 10-9 | β, δ |
Notes. We give the formal uncertainties derived from the population diagram fits within parentheses. Column 5: size adopted for the emitting region. Columns 6 and 7: range of the fractional abundances given in the literature, derived from the following works based on observations: (a): Bujarrabal et al. (1994); (b): Danilovich et al. (2016); (c): De Beck et al. (2013); (d): Decin et al. (2010a); (e): González Delgado et al. (2003); (f): Kim et al. (2010); (g): Lindqvist et al. (1988): (h): Milam et al. (2007); (i): Schöier et al. (2013). Columns 8 and 9: range of the fractional abundances given in the literature, which were derived from the following chemical and shocks models: (α): Agúndez et al. (2010); (β): Duari et al. (1999); (γ): Gobrecht et al. (2016); (δ): Li et al. (2016); (ϵ): Willacy & Millar (1997).
Value given in Table 6 in Decin et al. (2010a).
See Sect. 6.5.1.
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