Probing Cosmic Reionization and Molecular Gas Growth with TIME

Line intensity mapping (LIM) provides a unique and powerful means to probe cosmic structures by measuring the aggregate line emission from all galaxies across redshift. The method is complementary conventional galaxy redshift surveys that are object based demand exquisite point-source sensitivity. Tomographic Ionized-carbon Mapping Experiment (TIME) will measure star formation rate during reionization observing redshifted [C ii] 158 ?m (6 ? z 9) in LIM regime. TIME simultaneously study abundance of molecular gas era peak rotational CO lines emitted at 0.5 2. We present modeling framework predicts constraining power on number observables, including luminosity function auto- cross-correlation spectra, synergies with external tracers. Based an optimized survey strategy fiducial model parameters informed existing observations, we forecast constraints physical quantities relevant evolution, such as escape fraction ionizing photons reionization, faint-end slope high redshift, density noon. discuss how these can advance our understanding cosmological evolution two distinct epochs for TIME, starting 2021, they could be improved future phases experiment.