Table 6
Abundances estimated.
| Source | Molecule | Trot [K] | 〈X〉 | 〈XC〉 |
|---|---|---|---|---|
| AI CMi | SiO | 8 | 1.3 × 10−8 * | 3.1 × 10−8 |
| 29 SiO | 8 | 3.7 × 10−9 * | 9.3 × 10−8 | |
| 30SiO | 8 | <1.1 × 10−8 * | <2.7 × 10−8 | |
| R Scuti | SiO | 14 | 5.6 × 10−9 | 1.5 × 10−8 * |
| 29SiO | 14 | 5.0 × 10−10 | 4.2 × 10−9 * | |
| 30SiO | 14 | 1.1 × 10−9 | 2.7 × 10−9 * | |
| HCO+ | 14 | 3.8 × 10−10 | 1.0 × 10−9 * | |
| Red Rectangle | HCN | 8−14 | (1.4 ± 0.5) × 10−9 * | – |
| 89 Herculis | HCN | 8−14 | (1.1 ± 0.2) × 10−10 * | (1.9 ± 0.2) × 10−9 |
| SiS | 8−14 | (3.7 ± 0.5) × 10−11 * | (6.3 ± 0.8) × 10−11 | |
| CS | 8−14 | (5.9 ± 0.8) × 10−10 * | (5.1 ± 3.9) × 10−10 |
Notes. Averaged abundances of the emitting gas for SiO, 29SiO, and 30SiO in the case of AI CMi and R Sct. 〈X〉 is the abundance considering the total mass of the envelope. 〈Xc〉 is the abundance considering only the central region of the envelope and it represents ~40, ~40, ~100, and ~60% of the total mass in the case of AI CMi, R Sct, the Red Rectangle, and 89 Her, respectively. The asterisk, *, represents our preference for each case.
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