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Fig. 27

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Spectra from MIRI-MRS at 13.5-17.5 μm of the Class I source B1-a-NS showing only cold water (van Gelder et al. 2024a) and of the Class II disk DF Tau showing it being rich in warm H2O and other molecules (Grant et al. 2024). The colored spectra show LTE slab models of individual molecules contributing to the observed spectra; they are meant to illustrate the positions of the lines, not as a fit to the data. The temperatures used on the H2O slab models are 190 K (cold) and 490 K (warm).

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