Intensity mapping from the sky: synergizing the joint potential of
  [OIII] and [CII] surveys at reionization
  We forecast the ability of future-generation experiments to detect the
fine-structure lines of the carbon and oxygen ions, [CII] and [OIII] in
intensity mapping (IM) from the Epoch of Reionization ($z \sim 6-8$). Combining
the latest empirically derived constraints relating the luminosity of the
[OIII] line to the ambient star-formation rate, and using them in conjunction
with previously derived estimates for the abundance of [CII] in haloes, we
predict the expected auto-correlation IM signal to be observed using
next-generation facilities based on the Fred Young Submillimetre Telescope
(FYST) and the balloon-borne facility, Experiment for Cryogenic Large-Aperture
Intensity Mapping (EXCLAIM) over $z \sim 5.3 - 7$. We describe how improvements
to both the ground-based and balloon-based surveys in the future will enable a
cross-correlation signal to be detected at $\sim$ 10-40 $\sigma$ over $z \sim
5.3 - 7$. Finally, we propose a space-based mission targeting the [OIII] 88 and
52 $\mu$m lines along with the [CII] 158 $\mu$m line, configured to enhance the
signal-to-noise ratio of cross-correlation measurements. We find that such a
configuration can achieve a high-significance detection (hundreds to thousands
of $\sigma$) in both auto- and cross-correlation modes.
