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Fig. 6

image

Model B, τV = 2. a) Dust temperatures in the cloud 20, 70 and 150 days after the first photons enter the envelope. Upper lines: amorphous carbon, lower lines: silicate grains. b) The SED 5, 10, 20, 100 and 150 days after the cloud becomes visible. c) The extinction curve 1, 20, 80 and 150 days after the cloud becomes visible. Dots mark the effective, dashes the standard extinction curve.

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