From grains to pebbles: the influence of size distribution and chemical composition on dust emission properties

Open Access

Table A.1

Mass absorption coefficient κ for grains made of a-Sil at λ = 250 and 500 μm, and 0.87, 1.3, 1.9, and 2.8 mm.

Dust composition: a-Sil

Size distribution	Mass absorption coefficient κ_λ (cm² g⁻¹)
Log-normal a₀	κ_250 μm	κ_500 μm	κ_0.87 mm	κ_1.3 mm	κ_1.9 mm	κ_2.8 mm
0.1 μm	5.33	1.33	0.43	0.19	0.09	0.04
1 μm	5.39	1.33	0.43	0.19	0.09	0.04
10 μm	21.34	2.37	0.51	0.20	0.10	0.04
50 μm	41.01	12.48	3.19	0.85	0.26	0.07
100 μm	23.59	12.22	4.88	1.82	0.69	0.17
500 μm	3.78	3.69	2.73	1.91	1.14	0.57
1 mm	1.72	1.80	1.57	1.26	0.85	0.53
5 mm	0.30	0.31	0.32	0.31	0.28	0.22
1 cm	0.15	0.15	0.16	0.16	0.15	0.13

Power-law p	κ_250 μm	κ_500 μm	κ_0.87 mm	κ_1.3 mm	κ_1.9 mm	κ_2.8 mm
−4	5.33	1.33	0.43	0.19	0.09	0.04
−3.5	5.33	1.33	0.43	0.19	0.09	0.04
−3	5.35	1.33	0.43	0.19	0.09	0.04
−2.5	5.95	1.46	0.47	0.21	0.10	0.04
−2	9.50	2.87	1.13	0.56	0.30	0.15

Power-law a_max	κ_250 μm	κ_500 μm	κ_0.87 mm	κ_1.3 mm	κ_1.9 mm	κ_2.8 mm
0.1 μm	8.24	2.14	0.73	0.33	0.16	0.07
1 μm	6.30	1.55	0.50	0.22	0.11	0.05
10 μm	5.57	1.37	0.45	0.20	0.10	0.04
100 μm	5.38	1.34	0.44	0.19	0.09	0.04
100 μm	5.34	1.33	0.43	0.19	0.09	0.04
1 mm	5.33	1.33	0.43	0.19	0.09	0.04
1 cm	5.33	1.33	0.43	0.19	0.09	0.04

Notes. The values are given in the cases of: (i) a log-normal size distribution with a₀ = 0.1, 1, 10, 50, 100, and 500 μm, 1 and 5 mm, and 1 cm for 0.01 μm ≤ a ≤ 10 cm; (ii) a power-law size distribution with p =−4, −3.5, −3, −2.5, and −2 for 0.01 μm ≤ a ≤ 10 cm; (iii) a power-law size distribution with p =−3.5 for 0.01 μm ≤ a ≤ a_max where a_max = 0.1, 1, 10 and 100 μm, 1 mm, and 1 cm.

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