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Table 2
Summary of key structures in the inner region of R Scl from our MATISSE observations.
| Structure | Composition | Distance from the stellar center | Spectral signature | Central Wavelength |
|---|---|---|---|---|
| Star | – | 0–(5.3 ± 0.6) mas | Continuum | All |
| Rosseland Radius | – | 5.3 ± 0.6 mas (~0–1 R*) | − | − |
| Central Component | C2H2 + HCN | 0–5 mas (~0–1 R*) | Absorption band | 3.05 µm |
| Inmost Layer | C2H2 + HCN | 5–10 mas (~1–2 R*) | Emission band | 3.05 and 3.9 µm |
| Distinct Layer | C2H2 + HCN + amC | 12–18 mas (~2.3–3.4 R*) | Not clear | – |
| Fuzzy emission | amC (and SiC?) | 20–90 mas (~3.8–17.0 R*) | Continuum | All |
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