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Fig. 2.


Water absorption profile for the northern lensed image compared with the total [C II] 158μm (Litke et al. 2019), CO(8–7) (Dong et al. 2019), CO(2–1) (Aravena et al. 2016), and water emission profiles integrated over all three images. The H2O 20,2 − 11,1 and 21,1 − 20,2 emission profiles were taken from ALMA archival data (2013.1.00722.S and 2015.1.00117.S, respectively). All spectra were normalised to their peak/dip and the velocity zero scale is set to zCO = 5.6559, shown by the black dotted line. The minimum of the water trough (z = 5.6522) is shown by the blue dash-dotted line.

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