research
Fast Radio Bursts Trace Matter Without a Galaxy Model
A forecast combines fast-radio-burst dispersion with CMB lensing after simulations show free electrons closely follow total matter on large scales.
Summary
A forecast combines fast-radio-burst dispersion with CMB lensing after simulations show free electrons closely follow total matter on large scales.
Fast radio bursts probe free electrons along the line of sight, while cosmic-microwave-background lensing probes matter. Using FLAMINGO simulations, the authors estimate electron field-level bias parameters and argue that on large scales the electron distribution acts almost like a second realization of total matter. Their forecasts combine localized bursts with known redshifts and CMB weak lensing to constrain sigma-eight and matter density without strong dependence on galaxy-formation parameters. The projected precision is similar to or better than a conservative FRB-plus-galaxy-lensing combination. This is a simulation-informed forecast for future samples, not a new cosmological measurement.
Why it matters
A forecast combines fast-radio-burst dispersion with CMB lensing after simulations show free electrons closely follow total matter on large scales.
Limits and context
- This is a simulation-informed forecast for future samples, not a new cosmological measurement.
Key claims
A forecast combines fast-radio-burst dispersion with CMB lensing after simulations show free electrons closely follow total matter on large scales.
Qualification: This is a simulation-informed forecast for future samples, not a new cosmological measurement.
Evidence: source-2026-11-04-006
Sources
- arXiv preprint 2611.05351, original v1arXiv · primary research
Corrections
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