Understanding the non-Gaussian nature of Galactic foreground emissions towards small scales

arXiv:2606.22596 · astro-ph.CO, astro-ph.GA · Submitted 2026-06-21 · Read on arXiv

Fazlu Rahman, Pravabati Chingangbam, Kevin Huffenberger, Tuhin Ghosh, Dmitri Pogosyan, Tarun Souradeep, Changbom Park

astro-ph.CO, astro-ph.GA

Submitted: 2026-06-21

Comments: 29 pages, 12 figures

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

Terminology

• Non-Gaussianity — 53× in this paper · explained in 2 episodes
• Bispectrum — 4× in this paper · explained in 3 episodes
• Higher-order statistics — 4× in this paper · explained in 2 episodes
• Robustness — 4× in this paper · explained in 5 episodes
• Anisotropy — 3× in this paper · explained in 3 episodes
• Benchmark — 3× in this paper · explained in 2 episodes
• Primordial non-Gaussianity — 3× in this paper · explained in 2 episodes
• Adam — 2× in this paper · explained in 2 episodes
• Consistency — 2× in this paper · explained in 3 episodes
• Alignment — 1× in this paper · explained in 1 episode
• Anisotropic Morphology — 1× in this paper · explained in 1 episode
• Aperture — 1× in this paper · explained in 1 episode
• Fidelity — 1× in this paper · explained in 2 episodes
• Korea Institute for Advanced Study — 1× in this paper

Sources

• Sensitivity and foreground modelling for large-scale CMB B-mode polarization satellite missions
• Impact of Polarized Galactic Foreground Emission on CMB Lensing Reconstruction and Delensing of B-Modes
• The Simons Observatory: Combining delensing and foreground cleaning for improved constraints on inflation
• CMB-S4: Foreground-Cleaning Pipeline Comparison for Measuring Primordial Gravitational Waves
• The Simons Observatory: forecasted constraints on primordial gravitational waves with the expanded array of Small Aperture Telescopes
• The Simons Observatory: Assessing the Impact of Dust Complexity on the Recovery of Primordial $B$-modes
• An improved source-subtracted and destriped 408 MHz all-sky map
• Full-sky, arcminute-scale, 3D models of Galactic microwave foreground dust emission based on filaments
• ForSE: a GAN based algorithm for extending CMB foreground models to sub-degree angular scales
• Simulating a full-sky high resolution Galactic synchrotron spectral index map using neural networks
• ForSE+: Simulating non-Gaussian CMB foregrounds at 3 arcminutes in a stochastic way based on a generative adversarial network
• Full-sky Models of Galactic Microwave Emission and Polarization at Sub-arcminute Scales for the Python Sky Model
• Impact of Galactic non-Gaussian foregrounds on CMB lensing measurements
• Statistical properties of dust far-infrared emission
• Statistical Description of Synchrotron Intensity Fluctuations: Studies of Astrophysical Magnetic Turbulence
• Loops and spurs: The angular power spectrum of the Galactic synchrotron background
• Planck 2018 results. XI. Polarized dust foregrounds
• Characterization of the polarized synchrotron emission from Planck and WMAP data
• Planck dust polarization power spectra are consistent with strongly supersonic turbulence
• Skewness and Kurtosis as Indicators of Non-Gaussianity in Galactic Foreground Maps

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