A rising tide: Intrinsic alignments since the turn of the millennium

Abstract

The alignments of galaxies across the large-scale structure of the Universe are known to be a source of contamination for gravitational lensing, but they can also probe cosmology and the physics of galaxy evolution in many ways. In this review, I cover developments in our understanding of intrinsic alignments over the past 25 years on: (1) different approaches to model intrinsic alignments across a range of scales, (2) existing observational constraints, (3) predictions from cosmological numerical $N$-body and hydrodynamical simulations, (4) mitigation strategies to account for their contamination to lensing observables and (5) cosmological and astrophysical applications. While the review focuses mostly on two-point statistics of intrinsic alignments, I also give a summary of other statistics beyond two-point. Finally, I point out some of the open problems hindering the understanding or application of intrinsic alignments and how they might be overcome in the future.

80 pages, accepted at The Astronomy and Astrophysics Review, small edits to references

References in corpus (154)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• The Cosmic Evolution Survey (COSMOS) -- Overview
• Ultralight scalars as cosmological dark matter
• Properties of galaxies reproduced by a hydrodynamic simulation
• Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Simba: Cosmological Simulations with Black Hole Growth and Feedback
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• The Illustris simulation: the evolving population of black holes across cosmic time
• The Effective Field Theory of Cosmological Large Scale Structures
• Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
• Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements
• Clustering of dark matter tracers: generalizing bias for the coming era of precision LSS
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty
• Measuring primordial non-gaussianity without cosmic variance
• The CAMELS project: Cosmology and Astrophysics with MachinE Learning Simulations
• Intrinsic galaxy alignments from the 2SLAQ and SDSS surveys: luminosity and redshift scalings and implications for weak lensing surveys
• New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data
• The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
• Improved limits on the tensor-to-scalar ratio using BICEP and Planck
• The FLAMINGO project: cosmological hydrodynamical simulations for large-scale structure and galaxy cluster surveys
• Constraints on intrinsic alignment contamination of weak lensing surveys using the MegaZ-LRG sample
• Hyper Suprime-Cam Year 3 Results: Cosmology from Cosmic Shear Power Spectra
• Intrinsic alignments of SDSS-III BOSS LOWZ sample galaxies
• Potential sources of contamination to weak lensing measurements: constraints from N-body simulations
• The 2dF-SDSS LRG and QSO (2SLAQ) Luminous Red Galaxy Survey
• Dark Energy Survey Year 3 Results: Weak Lensing Shape Catalogue
• The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s
• DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys
• Separate Universe Simulations
• The halo model as a versatile tool to predict intrinsic alignments
• Galaxy Shapes and Intrinsic Alignments in The MassiveBlack-II Simulation
• Three Different Types of Galaxy Alignment within Dark Matter Halos
• The removal of shear-ellipticity correlations from the cosmic shear signal via nulling techniques
• Intrinsic alignment of simulated galaxies in the cosmic web: implications for weak lensing surveys
• Constraints on the Alignment of Galaxies in Galaxy Clusters from $\sim$14,000 Spectroscopic Members
• The SAMI Galaxy Survey: First detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies
• Alignment between galaxies and large-scale structure
• An EFT description of galaxy intrinsic alignments
• Alignment of quasar polarizations with large-scale structures
• Separating intrinsic alignment and galaxy-galaxy lensing
• Intrinsic alignments of galaxies in the MassiveBlack-II simulation: analysis of two-point statistics
• Radial Alignment in Simulated Clusters
• FAST-PT II: an algorithm to calculate convolution integrals of general tensor quantities in cosmological perturbation theory
• Near optimal bispectrum estimators for large-scale structure
• Multitracing Anisotropic Non-Gaussianity with Galaxy Shapes
• The halo model for cosmology: a pedagogical review
• 4MOST Consortium Survey 7: Wide-Area VISTA Extragalactic Survey (WAVES)
• Euclid Preparation. XXVIII. Forecasts for ten different higher-order weak lensing statistics
• Alignments between galaxies, satellite systems and haloes
• Bright galaxy sample in the Kilo-Degree Survey Data Release 4: selection, photometric redshifts, and physical properties
• Sources of contamination to weak lensing three-point statistics: constraints from N-body simulations
• SDSS-IV MaNGA: 3D spin alignment of spiral and S0 galaxies
• Advances in Constraining Intrinsic Alignment Models with Hydrodynamic Simulations
• The Dark Energy Survey Year 3 and eBOSS: constraining galaxy intrinsic alignments across luminosity and colour space
• Improving geometric and dynamical constraints on cosmology with intrinsic alignments of galaxies
• Galaxy imaging surveys as spin-sensitive detector for cosmological colliders
• Information content in the redshift-space galaxy power spectrum and bispectrum
• Strong detection of the CMB lensingxgalaxy weak lensingcross-correlation from ACT-DR4,PlanckLegacy and KiDS-1000
• Power spectrum of halo intrinsic alignments in simulations
• Unveiling the Intrinsic Alignment of Galaxies with Self-Calibration and DECaLS DR3 data
• Scale-dependent Galaxy Bias
• The mass dependence of dark matter halo alignments with large-scale structure
• Anisotropies of galaxy ellipticity correlations in real and redshift space: angular dependence in linear tidal alignment model
• Detection of anisotropic galaxy assembly bias in BOSS DR12
• KiDS-1000: Constraints on the intrinsic alignment of luminous red galaxies
• Observational detection of correlation between galaxy spins and initial conditions
• The MillenniumTNG Project: Intrinsic alignments of galaxies and halos
• Tightening geometric and dynamical constraints on dark energy and gravity: galaxy clustering, intrinsic alignment and kinetic Sunyaev-Zel'dovich effect
• On the relation between radial alignment of dark matter subhalos and host mass in cosmological simulations
• Imprint of anisotropic primordial non-Gaussianity on halo intrinsic alignments in simulations
• The IA Guide: A Breakdown of Intrinsic Alignment Formalisms
• Measuring the Tidal Response of Structure Formation: Anisotropic Separate Universe Simulations using TreePM
• Self-calibration of weak lensing systematic effects using combined two- and three-point statistics
• KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes
• Deviations from tidal torque theory: evolution of the halo spin-filament alignment
• KiDS-1000 cosmology: Combined second- and third-order shear statistics
• Alignments of Group Galaxies with Neighboring Groups
• Galaxy shape statistics in the effective field theory
• First Constraints on Growth Rate from Redshift-Space Ellipticity Correlations of SDSS Galaxies at $0.16<z<0.70$
• Tidal Torquing of Elliptical Galaxies in Cluster Environments
• Testing tidal alignment models for anisotropic correlations of halo ellipticities with N-body simulations
• Halo intrinsic alignment: dependence on mass, formation time and environment
• Power Spectrum of Intrinsic Alignments of Galaxies in IllustrisTNG
• Constraints on anisotropic primordial non-Gaussianity from intrinsic alignments of SDSS-III BOSS galaxies
• Alignment of galaxy spins in the vicinity of voids
• Modeling Intrinsic Galaxy Alignment in the MICE Simulation
• On the Cosmic Web Elongation in Fuzzy Dark Matter Cosmologies: Effects on Density Profiles, Shapes and Alignments of Halos
• Redshift requirements for cosmic shear with intrinsic alignment
• Impact of Baryonic Physics on Intrinsic Alignments
• Effects of Self-Calibration of Intrinsic Alignment on Cosmological Parameter Constraints from Future Cosmic Shear Surveys
• Field-level inference of galaxy intrinsic alignment from the SDSS-III BOSS survey
• Intrinsic alignments of galaxies and their effects on weak lensing detections of mass concentrations
• Gravitational wave fossils in nonlinear regime: halo tidal bias and intrinsic alignments from gravitational wave separate universe simulations
• The PAU Survey: Intrinsic alignments and clustering of narrow-band photometric galaxies
• Effects of overlapping sources on cosmic shear estimation: Statistical sensitivity and pixel-noise bias
• HYMALAIA: A Hybrid Lagrangian Model for Intrinsic Alignments
• Fundamental Plane of BOSS galaxies: Correlations with galaxy properties, density field and impact on RSD measurements
• Quadratic shape biases in three-dimensional halo intrinsic alignments
• Evidence for baryon acoustic oscillations from galaxy-ellipticity correlations
• First Evidence of Intrinsic Alignments of Red Galaxies at $z>1$: Cross-correlation between CFHTLenS and FastSound Samples
• Alignment of Galaxies and Clusters
• On the origin of intrinsic alignment in cosmic shear measurements: an analytic argument
• KiDS-1000: cross-correlation with Planck cosmic microwave background lensing and intrinsic alignment removal with self-calibration
• Lagrangian approach to super-sample effects on biased tracers at field level: galaxy density fields and intrinsic alignments
• Distinguishing between $\Lambda$CDM and $f(R)$ gravity models using halo ellipticity correlations in simulations
• Effects of galaxy intrinsic alignment on weak lensing peak statistics
• Photometric redshifts and intrinsic alignments: degeneracies and biases in 3$\times$2pt analysis
• An empirical approach to model selection: weak lensing and intrinsic alignments
• Correlated orientations of the axes of large quasar groups on Gpc scales
• The impact of Self-Interacting Dark Matter on the Intrinsic Alignments of Galaxies
• Galaxies and Halos on Graph Neural Networks: Deep Generative Modeling Scalar and Vector Quantities for Intrinsic Alignment
• Evolution of central galaxy alignments in simulations
• Analysis method for 3D power spectrum of projected tensor field with fast estimator and window convolution modelling: an application to intrinsic alignments
• Statistical anisotropy in galaxy ellipticity correlations
• Intrinsic Alignment as an RSD Contaminant in the DESI Survey
• Forecasting the power of Higher Order Weak Lensing Statistics with automatically differentiable simulations
• When galaxies align: intrinsic alignments of the progenitors of elliptical galaxies in the Horizon-AGN simulation
• KiDS+VIKING-450: An internal-consistency test for cosmic shear tomography with a colour-based split of source galaxies
• Merger Effects on the Spin and Shape Alignments of Galaxy Stellar, Cold and Hot Gas, and Dark Matter Components
• Imitating intrinsic alignments: A bias to the CMB lensing-galaxy shape cross-correlation power spectrum induced by the large-scale structure bispectrum
• Imprints of primordial magnetic fields on intrinsic alignments of galaxies
• Three-point intrinsic alignments of dark matter halos in the IllustrisTNG simulation
• Dark Energy Survey Year 3: Blue Shear
• KiDS-1000: Weak lensing and intrinsic alignment around luminous red galaxies
• The alignment of galaxies at the Baryon Acoustic Oscillation scale
• Relativistic distortions in galaxy density-ellipticity correlations: gravitational redshift and peculiar velocity effects
• An Empirical Model For Intrinsic Alignments: Insights From Cosmological Simulations
• The PAU Survey: Photometric redshift estimation in deep wide fields
• Intrinsic galaxy alignments in the KiDS-1000 bright sample: dependence on colour, luminosity, morphology, and galaxy scale
• Nonlinear redshift space distortion in halo ellipticity correlations: Analytical model and N-body simulations
• Impact of intrinsic alignments on clustering constraints of the growth rate
• Intrinsic alignments of galaxies around cosmic voids
• Anisotropic correlation functions as tracers of central galaxy alignments in simulations
• Third-order intrinsic alignment of SDSS BOSS LOWZ galaxies
• UNIONS: a direct measurement of intrinsic alignment with BOSS/eBOSS spectroscopy
• Galaxy clusters as intrinsic alignment tracers: present and future
• Early evolution of spin direction in dark matter halos and the effect of the surrounding large-scale tidal field
• The PAU Survey: Measuring intrinsic galaxy alignments in deep wide fields as a function of colour, luminosity, stellar mass and redshift
• Unbiased estimates of the shapes of haloes using the positions of satellite galaxies
• B-modes from galaxy cluster alignments in future surveys
• Joint Modelling of Astrophysical Systematics for Cosmology with LSST Cosmic Shear
• A unified linear intrinsic alignment model for elliptical and disc galaxies and the resulting ellipticity spectra
• Intrinsic correlations of galaxy sizes in a hydrodynamical cosmological simulation
• Probabilistic Estimators of Lagrangian Shape Biases: Universal Relations and Physical Insights
• The Density Parity Model for the Evolution of the Subhalo Inner Spin Alignments with the Cosmic Web
• Intrinsic alignments of the extended radio continuum emission of galaxies in the EAGLE simulations
• Information content in anisotropic cosmological fields: Impact of different multipole expansion scheme for galaxy density and ellipticity correlations
• Astrophysical systematics in Kinematic Lensing: quantifying an Intrinsic Alignment analog
• Intrinsic alignment from multiple shear estimates: A first application to data and forecasts for Stage IV
• Euclid Quick Data Release (Q1). Galaxy shapes and alignments in the cosmic web
• Cosmological consequences of intrinsic alignments super-sample covariance
• Learning Galaxy Intrinsic Alignment Correlations

Cited by in corpus (2)

• Three-point intrinsic alignments of galaxies and haloes in the FLAMINGO simulations
• Non-linear infusion of intrinsic alignment and source clustering: impact on non-Gaussian cosmic shear statistics