Cosmology with kSZ: breaking the optical depth degeneracy with Fast Radio Bursts

14 Nov 2019 Madhavacheril Mathew S. Battaglia Nicholas Smith Kendrick M. Sievers Jonathan L.

The small-scale cosmic microwave background (CMB) is dominated by anisotropies from the kinematic Sunyaev-Zeldovich (kSZ) effect, and upcoming experiments will measure it very precisely, but the optical depth degeneracy limits the cosmological information that can be extracted. At the same time, fast radio bursts (FRBs) are an exciting new frontier for astrophysics, but their usefulness as cosmological probes is currently unclear... (read more)

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