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Fig. 7


Spectra of the CO(6–5), CO(4–3), and CO(1–0) emission lines detected in MACSJ0032-arc binned in steps of 40.16 km s-1, expect for the CO(1–0) line where channels have a resolution of 144.54 km s-1. The cyan-shaded regions indicate channels where positive emission is detected. These channels are used to derive the CO line integrated fluxes and the velocity-integrated and velocity-averaged maps shown in Figs. 2 and 8, respectively. The solid red lines show the single or double Gaussian profiles that best fit the observed CO line profiles. The zero velocity is set to zCO = 3.6314.

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