Extragalactic Science with the Experiment for Cryogenic Large-aperture Intensity Mapping

Understand

The EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) is a balloon-borne cryogenic telescope that will survey the spectrum of diffuse emission from both the Milky Way and the cosmic web to probe star formation, the interstellar medium, and galaxy evolution across cosmic time.

• EXCLAIM's primary extragalactic science survey maps 305 deg$^2$ along the celestial equator with an R=512 spectrometer over the frequency range \nu=420-540 GHz, targeting emission of the [CII] line over redshifts 2.5<z<3.5 and several CO lines for z<1.
• Cross-correlation with galaxy redshift catalogs isolates line emission from the large-scale structure at target redshifts.
• In this paper, we forecast the sensitivity for both the two-point and conditional one-point cross-correlation.