A wedge-aware Fisher framework is introduced to forecast PNG constraints from Dark Ages 21-cm power spectrum and bispectrum, demonstrating significantly weaker bounds due to mode loss in two oscillatory inflation models.
A Fitting Formula for the Non-Linear Evolution of the Bispectrum
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abstract
We present a fitting formula for the non-linear evolution of the bispectrum in CDM models, obtained from measurements in high resolution numerical simulations. The formula interpolates between the perturbative and highly non-linear regimes, and generalizes previous results obtained for scale-free initial conditions.
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astro-ph.CO 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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Wedge-avoidance Fisher Forecasts for Primordial Non-Gaussianity from Dark-Ages 21-cm Power Spectrum and Bispectrum
A wedge-aware Fisher framework is introduced to forecast PNG constraints from Dark Ages 21-cm power spectrum and bispectrum, demonstrating significantly weaker bounds due to mode loss in two oscillatory inflation models.