Table 2
Characteristics of the absorption efficiencies of the silicate grains (Fig. 5).
Composition | β200−500µm | β1−3mm | r850 µm | r2mm |
---|---|---|---|---|
THEMIS I | 2.00 | 1.94 | 1.00 | 1.00 |
aSil-1/a-C2.5 nm | 2.80 | 2.09 | 0.58 | 0.48 |
aSil-2/a-C2.5 nm | 2.47 | 2.25 | 0.87 | 0.64 |
aSil-3/a-C2.5 nm | 2.20 | 2.25 | 1.24 | 0.91 |
aSil-4/a-C2.5 nm | 2.02 | 2.26 | 1.62 | 1.20 |
aSil-5/a-C2.5 nm | 2.97 | 1.85 | 0.61 | 0.60 |
aSil-6/a-C2.5 nm | 2.88 | 1.77 | 0.76 | 0.85 |
aSil-7/a-C2.5 nm | 2.79 | 1.73 | 0.92 | 1.11 |
Notes. The first column indicates the grain composition. The second and third columns give the far-IR (200 ⩽ λ ⩽ 500 µm) and millimetre (1 ⩽ λ ⩽ 3 mm) spectral indices, respectively. The fourth and fifth columns give the ratios of the aSil-x/a-C2.5nm to THEMIS I absorption efficiencies at 850 µm (353 GHz) and 2 mm (143 GHz), respectively. The numerical values are given for an oblate grain with e = 1.3 and aeff = 100 nm.
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