Table 8
Mass fractions of the different components responsible for the 10 μm feature as derived from our compositional fits.
| Target | Tc [K] | Olivine | Pyroxene | Forsterite | Enstatite | Am. Silica | PAH | Cont. | |||||||
| Small | Large | Small | Large | Small | Large | Small | Large | Small | Large | 8.6 | 11.2 | 12.7 | |||
|
|
|||||||||||||||
| PDS 204 | 337 |
22 |
47 |
– | – | 4.7 |
– | – | 13 |
– | 8.6 |
0.36 |
1.11 |
0.32 |
65.6 |
| MWC 789 | 347 |
77 |
– | 4.8 |
– | 2.5 |
1.7 |
– | 8.6 |
– | 4.2 |
0.07 |
0.05 |
– | 70.2 |
| LkHα 208 | 326 |
12 |
– | 16 |
54 |
1.2 |
5.7 |
– | – | – | 8.9 |
0.17 |
0.07 |
– | 24.6 |
| LkHα 339 | 383 |
70 |
– | 18 |
– | 2.4 |
1.5 |
– | 3.5 |
– | 3.5 |
0.19 |
– | 0.21 |
48.8 |
| MWC 137 | 634 |
12 |
60 |
– | 5.9 |
1.2 |
2.8 |
0.6 |
2.5 |
– | 11 |
0.13 |
– | 0.15 |
83.4 |
| MWC 147 | 466 |
– | 39 |
2.3 |
39 |
1.4 |
6.8 |
– | – | – | 9.3 |
0.03 |
– | 0.03 |
56.8 |
| R Mon | 272 |
– | 26 |
– | 20 |
7.7 |
12 |
19 |
– | 8.8 |
– | 0.05 |
– | 0.13 |
88.5 |
| PDS 27 | 302 |
17 |
– | 71 |
– | – | 0.6 |
– | – | – | 10 |
– | – | 0.12 |
81.4 |
| Hen 3-331 | 529 |
– | 73 |
1.7 |
6.9 |
1.4 |
7.4 |
2.9 |
– | 0.1 |
5.9 |
0.07 |
0.04 |
0.15 |
73.2 |
| Hen 3-847 | 342 |
– | – | 14 |
65 |
– | 7.3 |
1.5 |
2.5 |
1.2 |
7.5 |
0.18 |
0.15 |
0.16 |
52.4 |
| V921 Sco | 398 |
– | 90 |
– | – | – | 5.6 |
0.2 |
– | – | 3.6 |
0.23 |
– | 0.15 |
70.1 |
| MWC 878 | 331 |
7.4 |
82 |
– | – | – | 4.5 |
– | – | 0.3 |
5.7 |
0.07 |
– | 0.18 |
66.1 |
| PDS 477 | 326 |
30 |
30 |
– | 28 |
1.5 |
2.4 |
– | 0.9 |
– | 5.2 |
0.11 |
0.09 |
0.05 |
54.5 |
| LkHα 260 | 480 |
– | – | – | 74 |
3.6 |
5.2 |
4.5 |
0.9 |
1.1 |
5.7 |
– | – | – | 51.5 |
| MWC 297 | 512 |
16 |
70 |
– | – | – | 0.6 |
– | 0.8 |
– | 11 |
0.09 |
0.13 |
0.03 |
83.7 |
| AS 310 | 258 |
78 |
– | – | – | 1.5 |
– | – | 6.4 |
– | 13 |
0.55 |
– | 0.64 |
32.8 |
| PDS 543 | 333 |
– | – | 33 |
51 |
0.8 |
4.5 |
– | 0.5 |
– | 9.4 |
0.07 |
– | – | 27.6 |
|
|
|||||||||||||||
| ⟨ HBe ⟩ | 378 ± 26 | 20 ± 6.8 | 30 ± 8.1 | 9.2 ± 4.4 | 20 ± 6.4 | 1.7 ± 0.4 | 4.1 ± 0.8 | 1.7 ± 1.1 | 2.9 ± 1.0 | 0.6 ± 0.5 | 7.6 ± 0.8 | 0.15 ± 0.04 | 0.13 ± 0.06 | 0.13 ± 0.04 | 60.7 ± 4.7 |
| ⟨ HAe ⟩ | 379 ± 21 | 20 ± 4.6 | 23 ± 4.7 | 4.2 ± 2.2 | 33 ± 5.7 | 2.2 ± 0.3 | 5.5 ± 1.2 | 0.6 ± 0.2 | 3.6 ± 0.8 | 0.7 ± 0.2 | 5.7 ± 1.1 | 0.31 ± 0.06 | 0.75 ± 0.25 | 0.22 ± 0.06 | 52.1 ± 4.3 |
Notes. The small and large grains have volume equivalent radii of 0.1 and 1.5 μm respectively. The PAH and continuum contributions are given in percentages of the total flux of the 10 μm feature. The bottom rows represent the sample averaged numbers for the HBe stars and the HAe stars of van Boekel et al. (2005).
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