Table 5.
Input molecular species and abundances relative to H2 (in exponential notation) adopted for the identification of the spectral lines.
| Species | n(X)/n(H2) |
|||||
|---|---|---|---|---|---|---|
| M-type | Ref. | S-type | Ref. | C-type | Ref. | |
| CO | 3.0 (–4) | 1,2 | 6.0 (–4) | 3,4 | 1.0 (–3) | 2 |
| 13CO | 2.3 (–5) | 2.4 (–5) | 3.0 (–5) | |||
| C17O | 3.0 (–7) | 6.0 (–7) | 1.0 (–6) | |||
| C18O | 3.0 (–7) | 6.0 (–7) | 1.0 (–6) | |||
| H2O | 1.0 (–4) | 5 | 1.0 (–5) | 2 | 1.0 (–5) | 6 |
 |
1.0 (–7) | 1.0 (–8) | 1.0 (–8) | |||
 |
1.0 (–7) | 1.0 (–8) | 1.0 (–8) | |||
| SiO | 6.0 (–6) | 7 | 6.0 (–6) | 8 | 1.0 (–6) | 9 |
| 29SiO | 3.0 (–7) | 3.0 (–7) | 5.0 (–8) | |||
| 30SiO | 2.0 (–7) | 2.0 (–7) | 3.3 (–8) | |||
| SO | 3.5 (–6) | 10,11,12 | 3.5 (–6) | … | ||
| SO2 | 2.5 (–6) | 10,11,12 | 2.5 (–6) | … | ||
| SiS | 3.0 (–7) | 13 | 8.0 (–7) | 3.0 (–6) | 13 | |
| 29SiS | 1.5 (–8) | 4.0 (–8) | 1.5 (–7) | |||
| 30SiS | 1.0 (–8) | 2.7 (–8) | 1.0 (–7) | |||
| HCN | 1.2 (–7) | 14 | 7.0 (–7) | 14 | 2.9 (–5) | 14 |
| H13CN | 9.2 (–9) | 2.8 (–8) | 8.5 (–7) | |||
| PO | 1.0 (–7) | 15 | 1.0 (–7) | … | ||
| PN | 1.0 (–7) | 15 | 1.0 (–7) | … | ||
| CS | 1.0 (–7) | 10,12,16 | 5.0 (–7) | 1.0 (–6) | 17,18,19 | |
| 13CS | 7.7 (–9) | 2.0 (–8) | 3.0 (–8) | |||
| CN | 1.0 (–7) | 10,12,16 | 1.0 (–5) | 3,4 | 2.0 (–5) | 18,19 |
| 13CN | 3.9 (–9) | 4.0 (–7) | 5.9 (–7) | |||
| NH3 | 7.5 (–7) | 20 | 7.5 (–7) | 7.5 (–7) | ||
| H2S | 1.0 (–8) | 21 | 1.0 (–8) | 4.0 (–9) | 17 | |
| C2H2 | … | … | 1.0 (–5) | 22 | ||
| CCH | … | … | 5.0 (–6) | 18 | ||
| C4H | … | … | 3.0 (–6) | 18,19 | ||
| HC3N | … | … | 1.0 (–6) | 18,19 | ||
| SiC2 | … | … | 2.0 (–7) | 18,19,23 | ||
| 29SiC2 | … | … | 1.0 (–8) | |||
| 30SiC2 | … | … | 6.7 (–9) | |||
References. (1) Ziurys et al. (2009), (2) Danilovich et al. (2015), (3) Danilovich et al. (2014), (4) Schöier et al. (2011), (5) Maercker et al. (2016), (6) Lombaert et al. (2016), (7) González Delgado et al. (2003), (8) Ramstedt et al. (2009), (9) Schöier et al. (2006), (10) Decin et al. (2010b), (11) Danilovich et al. (2016), (12) Velilla Prieto et al. (2017), (13) Schöier et al. (2007), (14) Schöier et al. (2013), (15) De Beck et al. (2013), (16) Kim et al. (2010), (17) Agúndez et al. (2012), (18) Zhang et al. (2009), (19) Woods et al. (2003), (20) Wong et al. (2015), (21) Gobrecht et al. (2016), (22) Fonfría et al. (2008), (23) Cernicharo et al. (2010). References for the isotopic ratios are listed in the main text.
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