Forecasts for Broadband Intensity Mapping of the Ultraviolet-Optical Background with CASTOR and SPHEREx

Understand

Broadband tomography statistically extracts the redshift distribution of frequency dependent emission from the cross correlation of intensity maps with a reference catalog of galaxy tracers.

• We make forecasts for the performance of future all-sky UV experiments doing broadband tomography.
• We consider the Cosmological Advanced Survey Telescope for Optical-UV Research (CASTOR) and the Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer (SPHEREx).
• The dominant uncertainty is from variability in the photometric zero point, which scales with limiting magnitude and so mirror size.