Simulations show that primordial magnetic fields with different coherence scales produce unique angular autocorrelation signatures in intergalactic rotation measures, ranging from 90-degree correlations for large-scale models to sharp drops at 0.1-degree scales for small-scale stochastic models.
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JWST UV luminosity function calibration of reionization history bounds primordial magnetic fields to √<B²> < 0.27 nG (n_B=-2) and < 0.18 nG (n_B=2) at 95% CL by ruling out double reionization at z≈24.
Forecasts show DESI-like and SKA1-Mid observations could constrain primordial magnetic field amplitude and spectral index to roughly 10% precision via 21cm auto-spectrum and Lyα-21cm cross-spectrum.
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Simulated Rotation Measure Sky from Primordial Magnetic Fields
Simulations show that primordial magnetic fields with different coherence scales produce unique angular autocorrelation signatures in intergalactic rotation measures, ranging from 90-degree correlations for large-scale models to sharp drops at 0.1-degree scales for small-scale stochastic models.
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JWST Constraints on Primordial Magnetic Fields
JWST UV luminosity function calibration of reionization history bounds primordial magnetic fields to √<B²> < 0.27 nG (n_B=-2) and < 0.18 nG (n_B=2) at 95% CL by ruling out double reionization at z≈24.
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Primordial magnetic fields in the light of upcoming post-EoR Lyman-$\alpha$ and 21-cm observations
Forecasts show DESI-like and SKA1-Mid observations could constrain primordial magnetic field amplitude and spectral index to roughly 10% precision via 21cm auto-spectrum and Lyα-21cm cross-spectrum.