Table A.1
Molecular lines detected with the SMA towards L1287.
| Molecule | Transition | Frequency | EU |  |
|---|---|---|---|---|
| (GHz) | (K) | (cm−3) | ||
| CH3OH | 5(1,4)–4(2,2) | 216.946 | 56 | 2.33 × 106 |
| SiO | (5–4) | 217.105 | 31 | 3.25 × 108 |
| DCN | (3–2) | 217.239 | 21 | – |
| H2CO | 3(0,3)–2(0,2) | 218.222 | 21 | 2.56 × 106 |
| H2CO | 3(2,2)–2(2,1) | 218.476 | 68 | 2.96 × 106 |
| H2CO | 3(2,1)–2(2,0) | 218.760 | 68 | 3.36 × 106 |
| OCS | (18–17) | 218.903 | 100 | 4.28 × 105 |
| C18O | (2–1) | 219.560 | 16 | 9.33 × 103 |
| HNCO | 10(0,10)–9(0,9) | 219.798 | 58 | – |
| SO | 6(5)–5(4) | 219.949 | 35 | – |
| 13CO | (2–1) | 220.399 | 16 | 9.38 × 103 |
| DNC | (3–2) | 228.910 | 22 | – |
| CH3OH | 8(− 1,8)–7(0,7) | 229.759 | 89 | 2.62 × 107 |
| CH3OH | 3(− 2,2)–4(− 1,4) | 230.027 | 40 | 7.05 × 106 |
| CO | (2–1) | 230.538 | 17 | 1.07 × 104 |
Notes. (a) ρcrit = Aul∕γ, where Aul is the Einstein spontaneous emission coefficient and γ = σ⟨v⟩ is the collisional rate where σ is the cross section of the collision for each transition and 
is the average velocity of the collisional particles. As H2 is the most abundant molecule it is used as the dominant collisional particle. The Einstein spontaneous emission coefficients are taken from LAMDA (http://home.strw.leidenuniv.nl/~moldata) and splatalogue.net databases and γ values are taken from LAMDA database. We used T = 20 K (as 22 K is not available in the tabulated data).
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