COMAP Early Science. VII. Prospects for CO Intensity Mapping at Reionization

We introduce COMAP-EoR, the next generation of Carbon Monoxide Mapping Array Project aimed at extending CO intensity mapping to Epoch Reionization. COMAP-EoR supplements existing 30 GHz COMAP Pathfinder with two additional instruments and a new 16 receiver. This combination frequencies will be able simultaneously map CO(1--0) CO(2--1) reionization redshifts ($z\sim5-8$) in addition providing significant boost $z\sim3$ sensitivity Pathfinder. examine set models EoR signal, find power spectra spanning several orders magnitude, highlighting our extreme ignorance about this period cosmic history value measurement. carry out most detailed forecast date an cross-correlation, that five six we consider yield signal noise ratios (S/N) $\gtrsim20$ for brightest reaching S/N above 400. show that, these models, can make measurement molecular gas from $z\sim2-8$, as well probe population faint, star-forming galaxies predicted by undetectable traditional surveys. single model does not predict numerous faint emitters, COMAP-EoR-type is required rule their existence. briefly explore prospects third-generation Expanded Reionization (COMAP-ERA) capable detecting faintest characterizing signals detail.