Table 8
Best-fit dust models with two dust species (Mg2SiO4 and Fe2 SiO4) and their 
values for EP Aqr.
| Morphology | Dust mass | Mass correction(a) |  |
 |
 |
 |
|---|---|---|---|---|---|---|
| (M⊙) | (CM) | (photometry) | (ISO-SWS) | (PACS B) | (PACS R) | |
| Sphere | 2 × 10−5 | N/A | 23.8 | 2581 | 1442 | 558 |
| Disc (0°) | 7 × 10−7 | 0.04 | 16.3 | 1049 | 552 | 231 |
| Disc (90°) | 6 × 10−7 | 0.03 | 22.3 | 6165 | 799 | 266 |
| 5% Spiral (0°) | 1 × 10−6 | 0.05 | 18.0 | 1187 | 872 | 275 |
| 5% Spiral (90°) | 2 × 10−6 | 0.01 | 12.2 | 3371 | 134 | 116 |
| 0.5% Spiral (0°) | 8 × 10−6 | 0.40 | 8.2 | 1250 | 28.9 | 8.5 |
| 0.5% Spiral (90°) | 1 × 10−5 | 0.50 | 8.4 | 2539 | 168 | 38.7 |
| Spiral (0°) | 5 × 10−7 | 0.03 | 7.9 | 1141 | 344 | 13.5 |
| Spiral (90°) | 6 × 10−7 | 0.03 | 7.6 | 1838 | 335 | 30.7 |
| Number of sampled points | 18 | 145 | 26 | 29 | ||
Notes. Smallest 
for each data set are indicated with bold font. The large χ2 values are due to (i) that our models are not tailored to fit the data (see text), and (ii) that there is an offset between ISO-SWS and Herschel-PACS spectra. (a) CM is the mass correction of Eq. (9).
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