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Table 2
Stellar and circumstellar parameters of IRC + 10°216.
| Parameter | Value | Reference |
|---|---|---|
| Distance (d) | 123 pc | Groenewegen et al. (2012) |
| Stellar radius (R*) | 4 × 1013 cm | Agúndez et al. (2012) |
| Stellar effective temperature (T*) | 2330 K | Ridgway & Keady (1988) |
| Gas expansion velocity in region I (vexp,I) | 5 km s−1 | Fonfría et al. (2008) |
| Gas expansion velocity in region II (vexp,II) | 11 km s−1 | Fonfría et al. (2008) |
| Gas expansion velocity in region III (vexp,III) | 14.5 km s−1 | Cernicharo et al. (2000) |
| Microturbulence velocity (Δvturb) | 1 km s−1 | Skinner et al. (1999); De Beck et al. (2012) |
| Mass-loss rate (Ṁ) | 2.7 × 10−5 M⊙ yr−1 | Guélin et al. (2018) |
| Gas kinetic temperature (Tk) | T* × (r/R*)−0.68 | Guélin et al. (2018) |
| Gas to dust mass ratio (ρg∕ρd) | 300 | Agúndez et al. (2012) |
| Dust condensation radius (Rc) | 5 R* | Agúndez et al. (2012) |
| Dust temperature (Td) | 800 × (r/Rc)−0.375 K | Agúndez et al. (2012) |
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