Table 10
Molecular abundances in the inner layers of IRC +10216.
| Molecule | Abundance relative to H2 | Reference | |||
| 1–5 R∗ | → | 2 × 1015 cm | |||
|
|
|||||
| CS | 4 × 10-6 | → | 7 × 10-7 | (1) | |
| SiO | .................................. 1.8 × 10-7 | (1) | |||
| SiS | 3 × 10-6 | → | 1.3 × 10-6 | (1) | |
| NaCla | .................................. 1.8 × 10-9 | (1) | |||
| KCla | 7 × 10-10 | → | 5 × 10-10 | (1) | |
| AlCla | ..................................... 7 × 10-8 | (1) | |||
| AlF | ..................................... 1 × 10-8 | (1) | |||
| NaCNa | ..................................... 3 × 10-9 | (1) | |||
|
|
|||||
| CO | ..................................... 6 × 10-4 | (1) | |||
| C2H2 | ..................................... 8 × 10-5 | (2) | |||
| HCN | ..................................... 2 × 10-5 | (2) | |||
| CH4 | .................................. 3.5 × 10-6 | (3) | |||
| NH3 | ..................................... 2 × 10-6 | (4) | |||
| SiH4 | .................................. 2.2 × 10-7 | (3) | |||
| SiC2 | ..................................... 2 × 10-7 | (5) | |||
| H2O | ..................................... 1 × 10-7 | (6) | |||
| HCl | ..................................... 1 × 10-7 | (7) | |||
| HCP | .................................. 2.5 × 10-8 | (8) | |||
| C2H4 | ..................................... 2 × 10-8 | (9) | |||
| HF | ..................................... 8 × 10-9 | (7) | |||
| PH3 | ..................................... 8 × 10-9 | (10) | |||
| H2S | ..................................... 4 × 10-9 | (11) | |||
Notes.
Abundance in the 1–3 R∗ region is reduced to 1 × 10-11 (NaCl), 2 × 10-10 (KCl), 1 × 10-8 (AlCl), and 1 × 10-12 (NaCN).
References. (1) this study (NaCl, KCl, and AlCl abundances include both 35Cl and 37Cl isotopomers); (2) Fonfría et al. (2008); (3) Keady & Ridgway (1993); (4) Hasegawa et al. (2006); (5) Cernicharo et al. (2010); (6) Decin et al. (2010b); (7) Agúndez et al. (2011); (8) based on Agúndez et al. (2007); (9) Goldhaber et al. (1987); (10) based on Agúndez et al. (2008); (11) derived from the line 11,0 − 10,1 observed by Cernicharo et al. (2000).
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