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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 a combination of new galaxy redshift surveys and new X-ray and radio facilities.

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Fig. 1: Recent estimates of the local baryon census.
Fig. 2: The underlying structures that surveys such as DESI-BGS and WAVES will reveal.

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Correspondence to Simon Driver.

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Driver, S. The challenge of measuring and mapping the missing baryons. Nat Astron 5, 852–854 (2021). https://doi.org/10.1038/s41550-021-01441-w

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