Image Details
Caption: Figure 14.
Observed frequency of the CO lines CO(1–0) to CO(7–6) (from darker blue to lighter blue lines) and [C ii] 158 μm (red line) as a function of redshift. The gray-shaded and green-shaded areas show the frequency ranges sampled by the ALMA, JVLA, and PdBI/NOEMA bands considered in this paper.
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