Fig. 8

C–O stretching band of CH3OH (black) fitted with the sum of three Gaussians (red), which account for: mixed methanol (green dotted, centered at 1016 cm-1), segregated methanol (purple dotted, centered at 1025 cm-1), and methanol forming a type II clathrate hydrate with water molecules (blue dotted, centered at 1034 cm-1). A fourth Gaussian has been used to take into account the contribution of the blue wing of the H2O librational band (black dotted). The IR spectra correspond to a pre-cometary ice analog (E11) at a) T = 110 K; b)T = 150 K; and c) T = 160 K. The χ2 parameter is indicated for each fit.
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