Speaker
Description
CMB data are maximally projected along the line of sight, with intricate secondary anisotropies that each reveal a distinct chapter of cosmic evolution. In a series of six papers and ongoing, we embark on a deeply data-intensive, cross-correlation redshift tomography of CMB data, analyzing over two billion HEALPix pixels across more than twenty diffuse sky maps (e.g., Planck, IRAS, Herschel) together with LSS tracers from galaxy surveys with available spectroscopic redshifts pre-DESI. This unified campaign unlocks a panoramic view of cosmic baryons across space and time. Key results include: (1) a measurement of the cosmic thermal energy history, $\Omega_{\rm th}$, in hot gas and its implications for structure growth powered by gravitational energy, $\Omega_{\rm grav}$; (2) the most precise cosmic star-formation history to date, revealed by 11-band CIB tomography with fully constrained SEDs; (3) the cosmic dust evolution, $\Omega_{\rm dust}$, across all host environments; (4) the identification and removal of CIB leakage in ten Galactic dust maps, yielding a field-level component-separation algorithm as a constrained realization of 3D LSS data and producing the “CSFD” dust map; and, in the latest installment of the series, (5) the first tomographic detection of CO and [CII] line-intensity backgrounds, tracing the molecular-gas density, $\Omega_{\rm H_2}$, and the cosmic cooling budget over 12 Gyr of history.
