Non-Gaussianity in SMICA

arXiv:2511.22641 · astro-ph.CO · Submitted 2025-11-27 · Read on arXiv

astro-ph.CO

Submitted: 2025-11-27

Updated: 2026-09-21

Comments: 35 pages, 14 figures. v2: Corrected mistake in and extended analysis of section 6.4 (figure 10), conclusions unchanged v3: Corrected affiliation of one author v4: Version as published on JCAP, added DOI, v5: Added missing acknowledgement to ASIDF

DOI: 10.1088/1475-7516/2026/05/048

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Bispectrum — 174× in this paper · explained in 3 episodes
• Non-Gaussianity — 56× in this paper · explained in 2 episodes
• Primordial non-Gaussianity — 16× in this paper · explained in 2 episodes
• Multivariate Edgeworth Expansion — 8× in this paper
• Anisotropy — 5× in this paper · explained in 3 episodes
• Cosmic Microwave Background — 4× in this paper
• Spectral Matching Independent Component Analysis — 3× in this paper
• Gravitational Lensing — 2× in this paper · explained in 2 episodes
• Higher-order statistics — 2× in this paper · explained in 2 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Generalised Least Square — 1× in this paper
• Generalization — 1× in this paper · explained in 13 episodes
• Generative Model — 1× in this paper · explained in 2 episodes
• Trace — 1× in this paper · explained in 2 episodes
• Weak Lensing — 1× in this paper · explained in 2 episodes

Sources

• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• Planck 2018 results. VI. Cosmological parameters
• Review of local non-Gaussianity from multi-field inflation
• Non-Gaussianity in two-field inflation beyond the slow-roll approximation
• Euclid Definition Study Report
• The next non-Gaussianity frontier: what can a measurement with $\sigma(f_{\rm NL}) \lesssim 1$ tell us about multifield inflation?
• Bootstrapping Multi-Field Inflation: non-Gaussianities from light scalars revisited
• Large non-Gaussianities in the Effective Field Theory Approach to Single-Field Inflation: the Bispectrum
• Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• Planck 2018 results. IX. Constraints on primordial non-Gaussianity
• The Simons Observatory: Science goals and forecasts
• Probing Cosmic Inflation with the LiteBIRD Cosmic Microwave Background Polarization Survey
• SPHEREx: NASA's Near-Infrared Spectrophotmetric All-Sky Survey
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Non-parametric maximum likelihood component separation for CMB polarization data
• Pixel domain implementation of the Minimally Informed CMB MAp foreground Cleaning method
• Multi-Clustering Needlet-ILC for CMB B-modes component separation
• How bad could it be? Modelling the 3D complexity of the polarised dust signal using moment expansion
• Component separation with flexible models. Application to the separation of astrophysical emissions

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