Fig. 7
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Constraints on ρH2 just before “cosmic noon”, showing 95% upper limits and confidence intervals standardized to 68% when possible. In addition to constraints shown before in Fig. 6 from line searches (Riechers et al. 2019; Lenkić et al. 2020; Decarli et al. 2020), previous CO LIM analyses (Keating et al. 2016, 2020; Chung et al. 2022), and the present work, we also show COMAP Pathfinder 5-year forecasts from Chung et al. (2022).
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