Fig. 4

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Polarisation spectra predicted by our one-phase modelling for two radiation strengths of U = 1 (i.e. the standard ISM radiation field) and U = 100 (i.e. a hundred times higher than the standard ISM). Solid lines show the spectra for only aligned silicates, while dashed lines show the aligned silicate and carbonaceous mixture. The disruption by RAT-D is considered in the right panel for the composite grains with Smax = 107 erg cm−3. The total intensity is a summation of both silicate and carbonaceous grains.
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