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

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arxiv 1901.02418 v2 pith:6H6E6KV3 submitted 2019-01-08 astro-ph.CO

Mathew S. Madhavacheril , Nicholas Battaglia , Kendrick M. Smith , Jonathan L. Sievers This is my paper · ORCID
classification astro-ph.CO
keywords cosmologicaldegeneracydepthfrbsopticalbreakingburstscosmology
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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. We show that FRBs are uniquely suited for breaking the kSZ optical depth degeneracy. This opens up new possibilities for constraining cosmology with the kSZ effect, and new cosmological applications for FRBs.

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Forward citations

Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The One-Loop Power Spectrum of Fast Radio Burst Dispersion Measures

    astro-ph.CO 2026-08 accept novelty 7.0 of 10

    A one-loop EFT power spectrum model for FRB free-electron clustering matches FLAMINGO simulations to k ~ 0.2 h/Mpc, with electron bias b_e ~ 0.92 and near-perfect electron-matter correlation.

  2. Probing Cosmic Magnetism with Rotation Measure-Squared-Galaxy Cross-Correlations

    astro-ph.CO 2025-12 conditional novelty 6.0 of 10

    RM²–galaxy cross-correlations can isolate the magnetic field contribution from specific redshifts and may be detectable with SKA-era RM catalogs.

  3. Towards a multi-tracer neutrino mass measurement with line-intensity mapping

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    AtLAST [CII] line-intensity mapping, combined with CMB-S4 and DESI BAO forecasts, could reach sigma(sum m_nu) ~ 18 meV, and ~11.5 meV with a 21-cm tau prior.

  4. Periodic Fast Radio Bursts from Young Neutron Stars

    astro-ph.HE 2019-08 conditional novelty 6.0 of 10

    Repeating FRBs may be supergiant pulses from young, quickly spinning neutron stars; such sources would show periodic bursts that lengthen and fade over time.

  5. Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias

    astro-ph.CO 2019-08 conditional novelty 6.0 of 10

    kSZ tomography with future CMB and galaxy surveys could constrain correlated compensated isocurvature perturbations to sigma_A = 0.25, more than an order of magnitude better than galaxy surveys alone.

  6. Neutrino Mass Constraints from kSZ Tomography

    astro-ph.CO 2025-02 conditional novelty 5.0 of 10

    kSZ tomography will add little to neutrino mass constraints from Stage IV surveys unless the kSZ optical depth degeneracy is broken.

  7. Assessing the growth of structure over cosmic time with CMB lensing

    astro-ph.CO 2024-11 unverdicted novelty 1.0 of 10

    CMB lensing auto-spectra from Planck, ACT, and SPT agree with the LambdaCDM growth prediction, suggesting the S8 tension comes from low redshift or small scales.

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