Table 2
Dust model abundances and size distribution parameters (see Sect. 2.1 for details).
| Small grains (DHGL) | ||||||
| ρ | σ | a0 | Y | κ250μm | β | |
|
|
||||||
| (g/cm3) | (nm) | (Mdust/MH) | (cm2/g) | |||
| PAH | 2.24 | 0.40 | 0.64 | 7.80 × 10-4 | 0.001 | |
| SamC | 1.81 | 0.35 | 2.00 | 1.65 × 10-4 | 0.002 | 1.55 |
|
|
||||||
| Big grains (DHGL) | ||||||
| ρ | α | ac, at | Y | κ250μm | β | |
|
|
||||||
| (nm) | ||||||
| LamC | 1.81 | –2.8 | 150.0 | 1.45 × 10-3 | 0.014 | 1.55 |
| aSil | 3.5 | –3.4 | 200.0 | 7.8 × 10-3 | 0.034 | 2.11 |
|
|
||||||
| Accreted grains | ||||||
| ρ | α | ac, at | Y | κ250μm | β | |
|
|
||||||
| accC | 1.81 | –2.8 | 150.0 | 1.6 × 10-3 | 0.015 | 1.55 |
| accSi | 3.22 | –3.4 | 200.0 | 8.6 × 10-3 | 0.066 | 1.52 |
|
|
||||||
| Aggregates | ||||||
| ρ | α | ac, at | Y | κ250μm | β | |
|
|
||||||
| 0% | 2.87 | –2.4 | 234.0 | 1.02 × 10-2 | 0.111 | 1.33 |
| 10% | 2.59 | –2.4 | 242.0 | 1.02 × 10-2 | 0.140 | 1.32 |
| 25% | 2.16 | –2.4 | 256.0 | 1.02 × 10-2 | 0.208 | 1.30 |
| 40% | 1.72 | –2.4 | 276.0 | 1.02 × 10-2 | 0.331 | 1.27 |
Notes. ρ is the grain mass density, Y is the mass abundance per H, κ250μm is the opacity at 250 μm, and β is the intrinsic opacity spectral index for λ > 100μm for each dust population. For aggregates, the percentages give their degree of porosity (see Sect. 4.2 for details).
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