Signals from the early Universe: a comprehensive search for primordial features in Planck CMB datasets

arXiv:2605.30236 · astro-ph.CO · Submitted 2026-05-28 · Read on arXiv

astro-ph.CO

Submitted: 2026-05-28

Updated: 2026-05-28

Code: https://github.com/simonsobs/so_noise_models

Terminology

• Non-Gaussianity — 6× in this paper · explained in 2 episodes
• Simons Observatory — 4× in this paper
• Anisotropy — 3× in this paper · explained in 3 episodes
• Bispectrum — 2× in this paper · explained in 3 episodes
• Primordial non-Gaussianity — 2× in this paper · explained in 2 episodes
• Robustness — 2× in this paper · explained in 5 episodes
• Weak Lensing — 2× in this paper · explained in 2 episodes
• Abundance — 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
• Bayesian Inference — 1× in this paper · explained in 5 episodes
• Cold Dark Matter — 1× in this paper
• Core — 1× in this paper · explained in 2 episodes
• Decoupling — 1× in this paper · explained in 2 episodes
• Homogeneity — 1× in this paper · explained in 2 episodes
• Matter Power Spectrum — 1× in this paper · explained in 2 episodes
• Quantum fluctuations — 1× in this paper · explained in 2 episodes
• Wilkinson Microwave Anisotropy Probe — 1× in this paper

Sources

• Inflation: Theory and Observations
• Planck 2018 results. VI. Cosmological parameters
• Planck 2018 results. X. Constraints on inflation
• Planck 2018 results. IX. Constraints on primordial non-Gaussianity
• Bayesian inflationary reconstructions from Planck 2018 data
• Knot reconstruction of the scalar primordial power spectrum with Planck, ACT, and SPT CMB data
• Features and New Physical Scales in Primordial Observables: Theory and Observation
• Effects of particle production during inflation
• Cosmological Fluctuations from Infra-Red Cascading During Inflation
• Generation and Characterization of Large Non-Gaussianities in Single Field Inflation
• Oscillations in the CMB from Axion Monodromy Inflation
• Resonant Non-Gaussianity
• Folded Resonant Non-Gaussianity in General Single Field Inflation
• Features of heavy physics in the CMB power spectrum
• Primordial Features as Evidence for Inflation
• WMAP 7 Constraints on Oscillations in the Primordial Power Spectrum
• Planck 2013 results. XXII. Constraints on inflation
• Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
• Searching for Oscillations in the Primordial Power Spectrum: Constraints from Planck (Paper II)
• Updating constraints on inflationary features in the primordial power spectrum with the Planck data

Related papers

• Angular clustering and bias of photometric quasars in the Kilo-Degree Survey Data Release 4
• A Novel kinetic Sunyaev-Zel'dovich Estimator for Electron-Electron Correlations
• Magnetic fields at the dawn of structure formation I. The CARLA J1510+5958 proto-cluster
• Dark Energy Survey Year 6 Results: Weak Lensing and Galaxy Clustering Cosmological Analysis Framework
• Exploring the Impact of Systematic Bias in Type Ia Supernova Cosmology Across Diverse Dark Energy Parametrizations
• Non-Gaussian Galaxy Stochasticity and the Noise-Field Formulation