Line-Intensity Mapping

arXiv:2602.03011 · astro-ph.CO · Submitted 2026-02-03 · Read on arXiv

astro-ph.CO

Submitted: 2026-02-03

Updated: 2026-09-08

Comments: Invited and accepted review article for Physics Reports, 269 pages, 43 figures

Code: https://github.com/andreimesinger/21cmFAST

Project page: https://cosmoglobe.github.io/zodipy

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

Terminology

• Clustering — 60× in this paper · explained in 2 episodes
• Trace — 51× in this paper · explained in 2 episodes
• Abundance — 49× in this paper · explained in 1 episode
• Metallicity — 31× in this paper · explained in 3 episodes
• Bispectrum — 28× in this paper · explained in 3 episodes
• Line-Intensity Mapping — 27× in this paper
• Anisotropy — 20× in this paper · explained in 3 episodes
• Non-Gaussianity — 20× in this paper · explained in 2 episodes
• Epoch of Reionization — 18× in this paper
• Matter Power Spectrum — 13× in this paper · explained in 2 episodes
• AGN — 12× in this paper · explained in 1 episode
• Spectral Distortions — 12× in this paper · explained in 2 episodes
• Calibration — 11× in this paper · explained in 7 episodes
• Core — 11× in this paper · explained in 2 episodes
• Degeneracy — 11× in this paper · explained in 3 episodes
• Dust Attenuation — 10× in this paper · explained in 2 episodes
• Generalization — 10× in this paper · explained in 13 episodes
• 21-cm signal — 9× in this paper · explained in 1 episode
• Aperture — 9× in this paper · explained in 1 episode
• Primordial non-Gaussianity — 9× in this paper · explained in 2 episodes
• Gravitational Lensing — 8× in this paper · explained in 2 episodes
• Population Synthesis — 8× in this paper · explained in 2 episodes
• Fidelity — 6× in this paper · explained in 2 episodes
• alpha — 6× in this paper · explained in 1 episode
• Adam — 4× in this paper · explained in 2 episodes
• Consistency — 4× in this paper · explained in 3 episodes
• Higher-order statistics — 4× in this paper · explained in 2 episodes
• AGN Feedback — 3× in this paper · explained in 1 episode
• Canadian Hydrogen Intensity Mapping Experiment — 3× in this paper
• Fisher Information — 3× in this paper · explained in 3 episodes
• Gaussian Process Regression — 3× in this paper
• Independent Component Analysis — 3× in this paper
• Principal Component Analysis — 3× in this paper
• South Pole Telescope — 3× in this paper
• Sparsity — 3× in this paper · explained in 4 episodes
• APEX — 2× in this paper · explained in 1 episode
• Absorption Cross Section — 2× in this paper · explained in 1 episode
• Bayesian Framework — 2× in this paper · explained in 3 episodes
• Bayesian Inference — 2× in this paper · explained in 5 episodes
• Coherence Length — 2× in this paper · explained in 2 episodes
• Fisher matrix formalism — 2× in this paper · explained in 2 episodes
• Frequency Dependence — 2× in this paper · explained in 2 episodes
• Homogeneity — 2× in this paper · explained in 2 episodes
• Hubble Space Telescope — 2× in this paper
• Hubble Tension — 2× in this paper · explained in 9 episodes
• James Webb Space Telescope — 2× in this paper
• Jet Propulsion Laboratory — 2× in this paper
• Robustness — 2× in this paper · explained in 5 episodes
• Signal-to-noise ratio (SNR) — 2× in this paper · explained in 2 episodes
• Symmetry Breaking — 2× in this paper · explained in 3 episodes
• Terahertz Intensity Mapper — 2× in this paper
• Velocity Dispersion — 2× in this paper · explained in 2 episodes
• Active Galactic Nuclei (AGN) — 1× in this paper · explained in 1 episode
• Atacama Large Millimeter Array — 1× in this paper
• Atacama Submillimeter Telescope Experiment — 1× in this paper
• Benchmark — 1× in this paper · explained in 2 episodes
• CO-Cosmic Infrared Background — 1× in this paper
• Chebyshev Polynomials — 1× in this paper · explained in 2 episodes
• Cosmic Linear Anisotropy Solving System — 1× in this paper
• Distribution Matching — 1× in this paper · explained in 2 episodes
• Emission Line Galaxy — 1× in this paper
• Fast Radio Bursts (FRBs) — 1× in this paper · explained in 4 episodes
• Fine-Tuning — 1× in this paper · explained in 5 episodes
• Flexible Stellar Population Synthesis — 1× in this paper
• Forward modeling — 1× in this paper · explained in 2 episodes
• Lambda Cold Dark Matter — 1× in this paper
• Luminous Red Galaxy — 1× in this paper
• Maximum A Posteriori — 1× in this paper
• Phased-Array Feed — 1× in this paper
• Polycyclic aromatic hydrocarbons (PAHs) — 1× in this paper · explained in 2 episodes
• Principal Component Analysis (PCA) — 1× in this paper · explained in 4 episodes
• Simulated Infrared Dusty Extragalactic Sky — 1× in this paper
• Society of Photo-Optical Instrumentation Engineers — 1× in this paper
• Terahertz Integral Field Units with Universal Nanotechnology — 1× in this paper
• Tomographic Ionized-Carbon Mapping Experiment — 1× in this paper
• Transition Edge Sensors — 1× in this paper
• Verification — 1× in this paper · explained in 2 episodes
• Warm Dark Matter (WDM) — 1× in this paper · explained in 3 episodes
• Weak Lensing — 1× in this paper · explained in 2 episodes

Sources

• The Spectrum of the Universe
• Extragalactic Background Light: Measurements and Applications
• On the Origin of Near-Infrared Extragalactic Background Light Anisotropy
• Reconstructing emission from pre-reionization sources with cosmic infrared background fluctuation measurements by the JWST
• AKARI near-infrared background fluctuations arise from normal galaxy populations
• The Cosmic Infrared Background Resolved by Spitzer. Contributions of Mid-Infrared Galaxies to the Far-Infrared Background
• Planck 2013 results. XXX. Cosmic infrared background measurements and implications for star formation
• HerMES: Cosmic Infrared Background Anisotropies and the Clustering of Dusty Star-Forming Galaxies
• A Limit from the X-ray Background on the Contribution of Quasars to Reionization
• Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT
• Line-Intensity Mapping: Theory Review
• Line-Intensity Mapping: 2017 Status Report
• Astrophysics and Cosmology with Line-Intensity Mapping
• Tomography of the Cosmic Dawn and Reionization Eras with Multiple Tracers
• Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations
• An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment
• Cosmology with the SPHEREX All-Sky Spectral Survey
• Intensity Mapping across Cosmic Times with the Lyman-Alpha Line
• Intensity Mapping of Lyman-alpha Emission During the Epoch of Reionization
• COMAP Early Science: I. Overview

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