Intensity mapping: a new window into the cosmos

TL;DR

Intensity mapping is a promising technique for exploring the universe at redshifts below 6, offering more information than traditional surveys, and this paper introduces a new framework to optimize its cosmological potential.

Contribution

The paper presents an innovative approach to incorporate astrophysical knowledge into cosmological forecasts using intensity mapping, enabling better synergy with other surveys.

Findings

Framework allows full utilization of astrophysical knowledge

Potential to constrain physics beyond ΛCDM

Enhances cosmological parameter estimation

Abstract

The technique of intensity mapping (IM) has emerged as a powerful tool to explore the universe at $z < 6$. IM measures the integrated emission from sources over a broad range of frequencies, unlocking significantly more information than traditional galaxy surveys. Astrophysical uncertainties, however, constitute an important systematic in our attempts to constrain cosmology with IM. I describe an innovative approach which allows us to fully utilize our current knowledge of astrophysics in order to develop cosmological forecasts from IM. This framework can be used to exploit synergies with other complementary surveys, thereby opening up the fascinating possibility of constraining physics beyond $\Lambda$CDM from future IM observations.