Table 2
Parameters of the dust model for the diffuse ISM using the Demyk et al. (2022) optical constants for amorphous silicate grains.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sample | Abundances (†)  |
Sizes | Derived quantities (‡) | ||||||||||||||
| ID | Composition | µ (u) | ρ (g/cm3) | vSi | aC | VSG (ppm) | PAH | q |  |
 |
 (nm) |
 |
χ2 |  |
 |
RV | τV |
| X35 | 0.65 MgO−0.35 SiO2 | 141 | 2.7 | 3 | 72 | 11 | 9 | 3.2 | 261 | 262 | 92 | 222 | 1.7 | 5.0 | <115 | – | – |
| X40 | 0.60 MgO−0.40 SiO2 | 121 | 2.7 | 4 | 29 | 7 | 8 | 2.9 | 286 | 261 | 72 | 88 | 0.5 | 2.4 | <168 | 2.94 | – |
| X50A | 0.50 MgO−0.50 SiO2 | 100 | 2.7 | 3 | 57 | 10 | 6 | 3.0 | 267 | 248 | 54 | 72 | 0.8 | 4.0 | <129 | 3.10 | 1.04 |
| X50B | 0.50 MgO−0.50 SiO2 | 100 | 2.7 | 4 | 63 | 11 | 7 | 3.0 | 257 | 251 | 102 | 233 | 0.8 | 4.3 | <162 | 3.14 | – |
| E10 |  |
99.9 | 2.8 | 5 | 77 | 12 | 8 | 2.9 | 246 | 230 | 59 | 84 | 0.7 | 4.8 | <148 | 3.08 | – |
| E20 |  |
99.3 | 2.9 | 3 | 41 | 10 | 6 | 3.0 | 266 | 253 | 72 | 97 | 0.7 | 3.1 | <141 | 3.09 | – |
| E30 |  |
99.8 | 3.0 | 5 | 76 | 13 | 9 | 3.1 | 259 | 227 | 84 | 183 | 0.5 | 4.9 | <165 | 2.99 | – |
| E40 |  |
99.3 | 3.1 | 5 | 75 | 12 | 9 | 3.1 | 235 | 252 | 57 | 92 | 0.6 | 4.9 | <161 | 3.05 | 1.15 |
| E10R |  |
99.9 | 2.8 | 4 | 64 | 10 | 8 | 3.0 | 257 | 238 | 66 | 92 | 0.7 | 4.2 | <159 | 3.05 | – |
| E20R |  |
99.3 | 2.9 | 3 | 46 | 9 | 6 | 3.0 | 267 | 260 | 69 | 92 | 0.7 | 3.3 | <160 | 3.11 | – |
| E30R |  |
99.8 | 3.0 | 6 | 85 | 13 | 10 | 3.0 | 235 | 234 | 88 | 192 | 0.5 | 5.2 | <159 | 3.00 | 1.18 |
| E40R |  |
99.3 | 3.1 | 5 | 73 | 13 | 8 | 3.2 | 237 | 244 | 59 | 102 | 0.6 | 4.8 | <162 | 2.98 | 1.14 |
Notes. Notation as in Table 1. (†) The abundance of large amorphous silicate grains is [Si]/[H] = 15 ppm. (‡) Models that do not fit the reddening or polarised emission (Planck Collaboration XII 2020) are indicated by the long dash, and models that do not fit the dust emission (Dwek et al. 1997; Planck Collaboration XXI 2015) are indicated by the symbol ‘<’.
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