Table 1
Value of the MAC in the polyethylene matrix for the glassy samples X35, X4O, X5OA, and X5OB compared with that for the silicate component of cosmic dust models in polyethylene.
| Mass absorption coefficient in polyethylene (cm2 g −l·) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 μm | 250 μm | 500 μm | 850 μm | 1 mm | |||||||||||
| 10 K | 300 K | 10 K | 300 K | 10 K | 300 K | 10 K | 300 K | 10K | 300 K | ||||||
| X35 | 194.6 | 217.2 | 19.2 | 30.1 | 2.0 | 5.2 | 0.4 | 1.8 | 0.2 | 1.4 | |||||
| X4O | 200.9 | 216.9 | 68.6 | 74.7 | 25.4 | 31.3 | 7.9 | 14.0 | 5.0 | 11.2 | |||||
| X5OA | 153.4 | 160.2 | 27.9 | 36.5 | 3.9 | 8.1 | 1.7 | 3.5 | 1.7 | 3.1 | |||||
| X5OB | 136.8 | 152.2 | 36.5 | 39.9 | 10.2 | 12.8 | 2.9 | 4.8 | 2.0 | 3.5 | |||||
| <MACl)(1) | 171.4 | 186.4 | 38.1 | 45.3 | 10.4 | 14.3 | 3.2 | 6.03 | 2.2 | 4.8 | |||||
| <MAC2)(2) | 169.8 | 186.7 | 25.7 | 34.1 | 4.5 | 7.8 | 1.3 | 3.0 | 1.0 | 2.3 | |||||
| MAC sphere 0.1 μm(3) | 82 | 12.6 | 2.8 | 1.15 | 0.9 | ||||||||||
| MAC distrib spherical grains(3) | 84.2 | 12.6 | 2.8 | 1.15 | 0.9 | ||||||||||
| MAC CDE (3) | 99.6 | 15.5 | 3.5 | 1.4 | 1.1 | ||||||||||
Notes. (1)〈MAC1〉 represents the MAC averaged over the four samples X35, X4O, X50, and X5OB. (2)〈MAC2〉 represents the MAC averaged over the sample X35 and the mean of the X50 and X5OB samples. (3)These MAC were calculated in an ambient medium of refractive index n = 1.51 (corresponding to PE) and using the optical constants of the astrosìl from Li & Draine (2001).
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