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Table 3
Real part of the permittivity ϵ′, upper limit of the imaginary part ϵ′′, and lower limit of the absorption length La estimated at 190 GHz for regions of the nucleus coated by an ice-free dust mantle, as a function of the temperature from 300 to 40 K and for different porosities equal to 50, 60, 70, 80, and 90%.
| Ice-free dust mantle | |||
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| Temperature (K) | 300 | 230 | 40 |
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| ϵ′ (Φ = 90%) | 1.45 | 1.42 | 1.33 |
| ϵ′ (Φ = 80%) | 1.90 | 1.87 | 1.78 |
| ϵ′ (Φ = 70%) | 2.35 | 2.32 | 2.23 |
| ϵ′ (Φ = 60%) | 2.80 | 2.77 | 2.68 |
| ϵ′ (Φ = 50%) | 3.25 | 3.22 | 3.13 |
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| ϵ ′′ | <0.050 | <0.045 | <0.030 |
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| La (Φ = 90%) (cm) | >0.60 | >0.66 | >0.95 |
| La (Φ = 80%) (cm) | >0.68 | >0.75 | >1.10 |
| La (Φ = 70%) (cm) | >0.76 | >0.84 | >1.24 |
| La (Φ = 60%) (cm) | >0.83 | >0.92 | >1.35 |
| La (Φ = 50%) (cm) | >0.90 | >0.99 | >1.46 |
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