The challenge of measuring and mapping the missing baryons

The missing baryon problem may now be resolved, but the exact location and physical properties of the diffuse component remains unclear. This problem could be tractable, but requires the combination of new galaxy redshift surveys with new X-ray and radio facilities.
Comment: Published as a Comment in Nature Astronomy, August 2021, see also supporting article in Nature Portfolio: https://astronomycommunity.nature.com/videos/waves-deep