Parity Violation in Galaxy Shapes: Primordial Non-Gaussianity
arXiv:2509.08787 · doi:10.1103/fxh6-hpmk
Abstract
We present a comprehensive study of galaxy intrinsic alignment (IA) as a probe of parity-violating primordial non-Gaussianity (PNG). Within the effective field theory (EFT) framework, we show that the parity-odd IA power spectrum is sensitive to the collapsed limit of the parity-odd primordial trispectrum. For a -gauge inflationary model, the IA power spectrum is proportional to the power spectrum of the curvature perturbation, . However, the proportionality constants contain not only the PNG amplitude but also undetermined EFT bias parameters. We use -body simulations to determine the bias parameters for dark matter halos. Using these bias parameters, we forecast IA's constraining power, assuming data from the Dark Energy Spectroscopic Instrument (DESI) and the Rubin Observatory Legacy Survey of Space and Time (LSST). We find that the IA power spectrum can improve the current limits on the amplitude of parity-violating PNG derived from galaxy four-point correlation and CMB trispectrum analyses. Moreover, galaxy shapes are complementary to these probes as they are sensitive to different scales and trispectrum configurations. Beyond galaxy shapes, we develop a new method to generate initial conditions for simulations and forward models from the parity-odd trispectrum with an enhanced collapsed limit.
arXiv comment54 pages, 16 figures. Minor changes to match PRD accepted version
References in corpus (95)
- The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
- Large-Scale Structure of the Universe and Cosmological Perturbation Theory
- Non-Gaussianity from Inflation: Theory and Observations
- Quintessence and the Rest of the World
- An All-Sky Analysis of Polarization in the Microwave Background
- Statistics of Cosmic Microwave Background Polarization
- Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations
- The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
- Large-Scale Galaxy Bias
- Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)
- Transients from Initial Conditions in Cosmological Simulations
- Cosmological Non-Linearities as an Effective Fluid
- Intrinsic alignment-lensing interference as a contaminant of cosmic shear
- DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
- Shapes and Shears, Stars and Smears: Optimal Measurements for Weak Lensing
- Intrinsic and Extrinsic Galaxy Alignment
- Simulating cosmic structure formation with the GADGET-4 code
- Galaxy alignments: An overview
- New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data
- Parity violation in the Cosmic Microwave Background from a pseudoscalar inflaton
- The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
- DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation
- Weak lensing surveys and the intrinsic correlation of galaxy ellipticities
- Discriminating weak lensing from intrinsic spin correlations using the curl-gradient decomposition
- Constraints on intrinsic alignment contamination of weak lensing surveys using the MegaZ-LRG sample
- Target Selection and Validation of DESI Luminous Red Galaxies
- Accurate Estimators of Correlation Functions in Fourier Space
- A Measurement of the Quadrupole Power Spectrum in the Clustering of the 2dF QSO Survey
- Intrinsic alignments of SDSS-III BOSS LOWZ sample galaxies
- Biased Tracers and Time Evolution
- Large-scale Bias and Efficient Generation of Initial Conditions for Non-Local Primordial Non-Gaussianity
- Galaxy alignments: Observations and impact on cosmology
- New physics from the polarised light of the cosmic microwave background
- Galaxy alignments: Theory, modelling and simulations
- Clustering Fossils from the Early Universe
- Imprint of inflation on galaxy shape correlations
- Probing Parity-Violation with the Four-Point Correlation Function of BOSS Galaxies
- Cosmic Rulers
- Galaxy Bias and Primordial Non-Gaussianity
- Large-Scale Structure with Gravitational Waves II: Shear
- Accurate initial conditions for cosmological N-body simulations: Minimizing truncation and discreteness errors
- An optimal FFT-based anisotropic power spectrum estimator
- Dark Energy Survey Year 1 Results: Constraints on Intrinsic Alignments and their Colour Dependence from Galaxy Clustering and Weak Lensing
- KiDS+GAMA: Intrinsic alignment model constraints for current and future weak lensing cosmology
- Stochasticity of Bias and Nonlocality of Galaxy Formation: Linear Scales
- An EFT description of galaxy intrinsic alignments
- Cosmological Information in the Intrinsic Alignments of Luminous Red Galaxies
- Measurement of Parity-Odd Modes in the Large-Scale 4-Point Correlation Function of SDSS BOSS DR12 CMASS and LOWZ Galaxies
- Large-Scale Structure and Gravitational Waves III: Tidal Effects
- Primordial Gravity Waves and Weak Lensing
- Intrinsic alignments of galaxies in the MassiveBlack-II simulation: analysis of two-point statistics
- Primordial gravity wave fossils and their use in testing inflation
- Stochastic Bias from Non-Gaussian Initial Conditions
- Intrinsic alignments of BOSS LOWZ galaxies II: Impact of shape measurement methods
- Halo Shapes From Weak Lensing: The Impact of Galaxy--Halo Misalignment
- Higher-order initial conditions for mixed baryon-CDM simulations
- Galaxy bias and primordial non-Gaussianity: insights from galaxy formation simulations with IllustrisTNG
- Redshift and luminosity evolution of the intrinsic alignments of galaxies in Horizon-AGN
- Primordial Gravitational Waves from Galaxy Intrinsic Alignments
- 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
- Parity violation in the CMB trispectrum from the scalar sector
- Non-Gaussianity and large-scale structure in a two-field inflationary model
- Power spectrum of halo intrinsic alignments in simulations
- Probing Primordial Chirality with Galaxy Spins
- Local stochastic non-Gaussianity and N-body simulations
- Scale-dependent Galaxy Bias
- Strong orientation dependence of surface mass density profiles of dark haloes at large scales
- Two- and Three-Dimensional Probes of Parity in Primordial Gravity Waves
- Observational detection of correlation between galaxy spins and initial conditions
- KiDS-1000: Constraints on the intrinsic alignment of luminous red galaxies
- The MillenniumTNG Project: Intrinsic alignments of galaxies and halos
- The IA Guide: A Breakdown of Intrinsic Alignment Formalisms
- Value Added Catalog of physical properties of more than 1.3 million galaxies from the DESI Survey
- Power Spectrum of Intrinsic Alignments of Galaxies in IllustrisTNG
- Constraints on anisotropic primordial non-Gaussianity from intrinsic alignments of SDSS-III BOSS galaxies
- Precise Calibration of the One-Loop Trispectrum in the Effective Field Theory of Large Scale Structure
- Gravitational wave fossils in nonlinear regime: halo tidal bias and intrinsic alignments from gravitational wave separate universe simulations
- HYMALAIA: A Hybrid Lagrangian Model for Intrinsic Alignments
- Quadratic shape biases in three-dimensional halo intrinsic alignments
- No evidence for parity violation in BOSS
- Observational search for primordial chirality violations using galaxy angular momenta
- Analysis method for 3D power spectrum of projected tensor field with fast estimator and window convolution modelling: an application to intrinsic alignments
- Integrated perturbation theory for cosmological tensor fields. I. Basic formulation
- Three-point intrinsic alignments of dark matter halos in the IllustrisTNG simulation
- Intrinsic galaxy alignments in the KiDS-1000 bright sample: dependence on colour, luminosity, morphology, and galaxy scale
- UNIONS: a direct measurement of intrinsic alignment with BOSS/eBOSS spectroscopy
- Third-order intrinsic alignment of SDSS BOSS LOWZ galaxies
- Extracting parity-violating gravitational waves from projected tidal force tensor in three dimensions
- Probing vector chirality in the early Universe
- Correlating galaxy shapes and initial conditions: an observational study
- The PAU Survey: Measuring intrinsic galaxy alignments in deep wide fields as a function of colour, luminosity, stellar mass and redshift
- The Bispectrum of Intrinsic Alignments: Theory Modelling and Forecasts for Stage IV Galaxy Surveys
- The Bispectrum of Intrinsic Alignments: II. Precision Comparison Against Dark Matter Simulations