Table 5
Abundances relative to H2 of halide molecules found towards AGB stars.
| S-type stars | Carbon star | Oxygen-rich stars | ||||
|---|---|---|---|---|---|---|
| Molecule | W Aql | χ Cyg | R And | CW Leo | R Dor | IK Tau |
| AlCl | 1.6 × 10−7–2.4 × 10−7 | ... | ... | 7 × 10−8 | 2.5 × 10−8 | 9 × 10−10 |
| AlF | 1 × 10−7–4 × 10−8 | ... | ... | 1 × 10−8 | ... | ... |
| HCl | 9.7 × 10−8 | 6.5 × 10−8 | 1.5 × 10−8 | 1 × 10−7 | ... | ... |
| HF | ≤1 × 10−8 | 1.2 × 10−8 | ... | 8 × 10−9 | ... | ... |
| Ref. | This work | This work(a) | 1 | 2 | 3 | 3 |
Notes. For comparison, the solar abundances of F and Cl, relative to H2, are 7.2 × 10−8 and 6.3 × 10−7, respectively (Asplund et al. 2009). (a)See Sect. 6.1.1 and Appendix C.
References. (1) Yamamura et al. (2000); (2) Agúndez et al. (2011, 2012); (3) Decin et al. (2017).
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