Laboratory spectroscopy of theoretical ices: Predictions for JWST and test for astrochemical models

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Table 3

Ice composition during the experiments compared to predicted ratios based on the model.

		^(a)	^(a)		χ_CO^(a)		^(a)		^(a)		N/10¹⁸	d

			Exp.	Model	Exp.	Model	Exp.	Model	Exp.	Model	(mol cm⁻²)	(ML)
Layered	Layer 1	100%	74%	67.5%	–	–	32%	27.5%	–	–	1.08	870
	Layer 2	100%	–	–	144%	146%	48%	46%	41%	38%	0.22	180

Mixed		100%	57%	58%	33%	37%	32%	29%	–	–	1.47	1180

Notes. The measured column density N, corresponding ice thickness d, and consequential relative ratios have an error of 20–30% for strong bands (H₂O, CH₃OH, and CO) and 50% for week bands (N₂ and O₂).^(a) Abundance of the molecular species in the ice with respect to H₂O.

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