Table 1.
Physical parameters of the three shells towards the Fried Egg Nebula as modelled using 2-DUST and those of the central heating object IRAS 17163.
| Fried Egg Nebula | Mgas | Td | rd | tkin | Ṁ |
|---|---|---|---|---|---|
| (10−3 M⊙) | (K) | (″) | (yr) | (M⊙ yr−1) | |
| Hot inner shell | 0.021 | 620–480 | 0.3–0.45 | 30.8 | 6 × 10−7 |
| Intermediate shell | 0.90 | 460–320 | 0.6–1.1 | 102.7 | 9 × 10−4 |
| Outer shell | 5.6 | 240–200 | 1.9–2.5 | 123.2 | 5 × 10−5 |
| log(L⋆/L⊙) | T⋆ | d | |||
| IRAS 17163 | (K) | (kpc) | |||
| 5.7 | 8500 | 1.2 | |||
Notes. The sum of the dust mass within the three shells and a gas-to-dust ratio of 100 results in a total mass of ∼6.5 × 10−3 M⊙ within the Fried Egg Nebula. We note that the reported total mass does not include the outermost shell modelled in Hutsemékers et al. (2013). The reported kinematic scales and mass-loss rates correspond to an expansion velocity, υexp, of 30 km s−1, and therefore provide upper and lower limits. respectively.
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