Exploring the Primordial Power Spectrum with Dark-Age 21 cm fluctuations

arXiv:2609.39432 · astro-ph.CO, gr-qc, hep-ph · Submitted 2026-09-30 · Read on arXiv

astro-ph.CO, gr-qc, hep-ph

Submitted: 2026-09-30

Updated: 2026-09-30

Terminology

• Abundance — 4× in this paper · explained in 1 episode
• 21-cm signal — 3× in this paper · explained in 1 episode
• Degeneracy — 3× in this paper · explained in 3 episodes
• Non-Gaussianity — 3× in this paper · explained in 2 episodes
• alpha — 3× in this paper · explained in 1 episode
• Core — 2× in this paper · explained in 2 episodes
• Gravitational Lensing — 2× in this paper · explained in 2 episodes
• Reheating — 2× in this paper · explained in 2 episodes
• Spectral Distortions — 2× in this paper · explained in 2 episodes
• 21 cm Line Signal — 1× in this paper · explained in 1 episode
• 21-cm global signal — 1× in this paper · explained in 1 episode
• Accuracy — 1× in this paper · explained in 1 episode
• Adam — 1× in this paper · explained in 2 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Matter Power Spectrum — 1× in this paper · explained in 2 episodes
• Primordial Black Holes (PBHs) — 1× in this paper · explained in 7 episodes
• Primordial non-Gaussianity — 1× in this paper · explained in 2 episodes

Sources

• Planck 2018 results. X. Constraints on inflation
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models
• SPT-3G D1: CMB temperature and polarization power spectra and cosmology from 2019 and 2020 observations of the SPT-3G Main field
• Constraints on Primordial Power Spectrum from Galaxy Luminosity Functions
• Impact of the primordial fluctuation power spectrum on the reionization history
• The primordial matter power spectrum on sub-galactic scales
• Constraints on small-scale cosmological fluctuations from SNe lensing dispersion
• Impact of EDGES 21cm Global Signal on Primordial Power Spectrum
• Probing Small Scale Primordial Power Spectrum with 21cm Line Global Signal
• 21 cm Angular Power Spectrum from Minihalos as a Probe of Primordial Spectral Runnings
• How accurately can 21 cm tomography constrain cosmology?
• Precise Measurements of Primordial Power Spectrum with 21 cm Fluctuations
• Probing small-scale cosmological fluctuations with the 21 cm forest: effects of neutrino mass, running spectral index and warm dark matter
• Minimally Parametric Power Spectrum Reconstruction from the Lyman-alpha Forest
• Neutrino masses and cosmology with Lyman-alpha forest power spectrum
• Forecasts for CMB \mu- and i-type spectral distortion constraints on the primordial power spectrum on scales 8 < k < 10^4 Mpc^-1 with the future Pixie-like experiments
• Testing Inflation and Curvaton Scenarios with CMB Distortions
• Running the running
• CMB spectral distortions in generic two-field models

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