Weak Gravitational Lensing
arXiv:2501.07938 · doi:10.1016/B978-0-443-21439-4.00071-7
Abstract
This chapter provides a comprehensive overview of weak gravitational lensing and its current applications in cosmology. We begin by introducing the fundamental concepts of gravitational lensing and derive the key equations for the deflection angle, lensing potential, convergence, and shear. We explore how weak lensing can be used as a cosmological probe, discussing cosmic shear, galaxy-galaxy lensing, and their combination with galaxy clustering in the 32pt analysis. The chapter covers the theoretical framework for modeling lensing observables, shear estimation techniques, and major systematic effects such as intrinsic alignments and baryonic feedback. We review the current results of weak lensing cosmology from major surveys and outline prospects for future advancements in the field.
arXiv comment25 pagers, 14 figures. This version matches the published chapter in the Encyclopedia of Astrophysics
References in corpus (47)
- LSST: from Science Drivers to Reference Design and Anticipated Data Products
- Weak Gravitational Lensing
- Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
- The physics driving the cosmic star formation history
- The Connection between Galaxies and their Dark Matter Halos
- KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
- KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
- CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey
- Euclid. I. Overview of the Euclid mission
- Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
- The effects of galaxy formation on the matter power spectrum: A challenge for precision cosmology
- Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Data Calibration
- The Kilo-Degree Survey
- Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty
- HMcode-2020: Improved modelling of non-linear cosmological power spectra with baryonic feedback
- Practical Weak Lensing Shear Measurement with Metacalibration
- Joint Galaxy-Lensing Observables and the Dark Energy
- Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm
- Measurement of intrinsic alignments in galaxy ellipticities
- Beyond linear galaxy alignments
- Planck 2018 results. VI. Cosmological parameters
- Hyper Suprime-Cam Year 3 Results: Cosmology from Cosmic Shear Power Spectra
- Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations
- Dark Energy Survey Year 3 Results: Weak Lensing Shape Catalogue
- The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s
- Dark Energy Survey Year 3 Results: Redshift Calibration of the Weak Lensing Source Galaxies
- KiDS-1000 catalogue: Weak gravitational lensing shear measurements
- Precision calculations of the cosmic shear power spectrum projection
- Comprehensive Two-Point Analyses of Weak Gravitational Lensing Surveys
- Likelihood-free inference with neural compression of DES SV weak lensing map statistics
- COSEBIs: Extracting the full E-/B-mode information from cosmic shear correlation functions
- DES Y3 results: Blending shear and redshift biases in image simulations
- Metacalibration: Direct Self-Calibration of Biases in Shear Measurement
- Cosmology with the Wide-Field Infrared Survey Telescope -- Multi-Probe Strategies
- Hyper Suprime-Cam Year 3 Results: Cosmology from Galaxy Clustering and Weak Lensing with HSC and SDSS using the Minimal Bias Model
- Dark Energy Survey Year 3 Results: Galaxy clustering and systematics treatment for lens galaxy samples
- An Implementation of Bayesian Lensing Shear Measurement
- Dark Energy Survey Year 3 Results: High-precision measurement and modeling of galaxy-galaxy lensing
- On the insufficiency of arbitrarily precise covariance matrices: non-Gaussian weak lensing likelihoods
- Dark Energy Survey Year 3 Results: Exploiting small-scale information with lensing shear ratios
- Dark Energy Survey Year 3 Results: Multi-Probe Modeling Strategy and Validation
- Dark Energy Survey Year 3 results: Magnification modeling and impact on cosmological constraints from galaxy clustering and galaxy-galaxy lensing
- Integrated approach to cosmology: Combining CMB, large-scale structure and weak lensing
- The IA Guide: A Breakdown of Intrinsic Alignment Formalisms
- Metadetection Weak Lensing for the Vera C. Rubin Observatory
- Dark Energy Survey Year 3 results: likelihood-free, simulation-based CDM inference with neural compression of weak-lensing map statistics