The FLAMINGO Project: Exploring the X-ray--cosmic-shear cross-correlation as a probe of large-scale structure

arXiv:2602.02484 · astro-ph.CO, astro-ph.GA · Submitted 2026-02-02 · Read on arXiv

astro-ph.CO, astro-ph.GA

Submitted: 2026-02-02

Updated: 2026-09-19

Comments: Accepted for publication in MNRAS. The revised version accounts for attenuation of the X-ray flux from unresolved AGN, reducing their impact and yielding stronger constraints on baryonic feedback strength. The X-ray-cosmic-shear cross-correlations predicted by FLAMINGO's strongest baryonic feedback variations are now incompatible with the observations; the fiducial model is preferred instead

Code: https://github.com/jchelly/LightconeIO

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

Terminology

• AGN — 358× in this paper · explained in 1 episode
• Baryonic Feedback — 53× in this paper · explained in 3 episodes
• AGN Feedback — 41× in this paper · explained in 1 episode
• Abundance — 35× in this paper · explained in 1 episode
• Calibration — 7× in this paper · explained in 7 episodes
• Clustering — 4× in this paper · explained in 2 episodes
• Trace — 4× in this paper · explained in 2 episodes
• Active Galactic Nuclei — 3× in this paper
• Active Galactic Nuclei (AGN) — 3× in this paper · explained in 1 episode
• Core — 3× in this paper · explained in 2 episodes
• Matter Power Spectrum — 3× in this paper · explained in 2 episodes
• ROSAT All-Sky Survey — 3× in this paper
• Aperture — 2× in this paper · explained in 1 episode
• Degeneracy — 2× in this paper · explained in 3 episodes
• Robustness — 2× in this paper · explained in 5 episodes
• Stellar Feedback — 2× in this paper · explained in 2 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Benchmark — 1× in this paper · explained in 2 episodes
• Gravitational Lensing — 1× in this paper · explained in 2 episodes
• Smooth Particle Hydrodynamic — 1× in this paper

Sources

• The kinetic Sunyaev Zeldovich effect as a benchmark for AGN feedback models in hydrodynamical simulations: insights from DESI + ACT
• The luminosity function and clustering of bright quasars in the FLAMINGO cosmological simulations
• The impact of strong feedback on galaxy group scaling relations
• First measurement of the cross-correlation between CMB weak lensing and X-ray emission
• The Cosmological Parameters (2021)
• Weak Gravitational Lensing
• The SRG/eROSITA all-sky survey: X-ray scaling relations of galaxy groups and clusters in the western Galactic hemisphere
• Joint X-ray, kinetic Sunyaev-Zeldovich, and weak lensing measurements: toward a consensus picture of efficient gas expulsion from groups and clusters
• The suppression of the matter power spectrum: strong feedback from X-ray gas mass fractions, kSZ effect profiles, and galaxy-galaxy lensing
• Self-consistent secondary cosmic microwave background anisotropies and extragalactic foregrounds in the FLAMINGO simulations

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