Illuminating the Dark Sector: Understanding Modified Gravity Signatures with Cross-Correlations of Gravitational Waves and Large-Scale Structure

Abstract

We investigate the synergy between large-scale structure (LSS) observations and gravitational wave (GW) events for testing modified gravity. In particular, we forecast the LSS $\times$ GW cross-correlation signal using Stage-IV LSS surveys, such as Euclid, in combination with future detections from the Einstein Telescope. This cross-correlation provides a novel probe of fundamental physics, potentially revealing deviations from the $\Lambda$CDM paradigm that may not be accessible through electromagnetic observations alone. We describe the considered modified gravity scenarios, the relevant LSS and GW observables, and the synthetic forecast methodology. Our results demonstrate that combining LSS and GWs can significantly enhance constraints on departures from General Relativity, opening a new window for multi-messenger cosmology. We further assess the observational requirements GW experiments must meet to improve upon constraints obtainable from LSS alone.

33 pages, 11 figures. Accepted on JCAP

References in corpus (43)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• In the Realm of the Hubble tension $-$ a Review of Solutions
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• A gravitational-wave standard siren measurement of the Hubble constant
• Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Tensions between the Early and the Late Universe
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• Dark Energy after GW170817: dead ends and the road ahead
• Cosmology and fundamental physics with the Euclid satellite
• Strong constraints on cosmological gravity from GW170817 and GRB 170817A
• Dark Energy after GW170817 and GRB170817A
• Euclid. I. Overview of the Euclid mission
• One percent determination of the primordial deuterium abundance
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• Testing General Relativity in Cosmology
• Extended Limber Approximation
• Search for the isotropic stochastic background using data from Advanced LIGO's second observing run
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• GetDist: a Python package for analysing Monte Carlo samples
• Searching for modified growth patterns with tomographic surveys
• Testing gravity with CAMB and CosmoMC
• Speed of Gravitational Waves and the Fate of Scalar-Tensor Gravity
• CFHTLenS: Testing the Laws of Gravity with Tomographic Weak Lensing and Redshift Space Distortions
• KiDS-1000 Methodology: Modelling and inference for joint weak gravitational lensing and spectroscopic galaxy clustering analysis
• The Science of the Einstein Telescope
• On the Validity of Cosmological Fisher Matrix Forecasts
• The Hitchhiker's guide to the galaxy catalog approach for gravitational wave cosmology
• MGCAMB with massive neutrinos and dynamical dark energy
• Anisotropies of gravitational-wave standard sirens as a new cosmological probe without redshift information
• Cross-correlation of the astrophysical gravitational-wave background with galaxy clustering
• Detectability and parameter estimation of stellar origin black hole binaries with next generation gravitational wave detectors
• Prospects of testing late-time cosmology with weak lensing of gravitational waves and galaxy surveys
• New MGCAMB tests of gravity with CosmoMC and Cobaya
• Learning how to surf: Reconstructing the propagation and origin of gravitational waves with Gaussian Processes
• The observed number counts in luminosity distance space
• Detecting Dark Energy Fluctuations with Gravitational Waves
• Constraining extended cosmologies with GW$\times$LSS cross-correlations
• Euclid preparation. LII. Forecast impact of super-sample covariance on 3x2pt analysis with Euclid
• Euclid preparation. LIX. Angular power spectra from discrete observations
• Euclid: Relativistic effects in the dipole of the 2-point correlation function
• Exploring future synergies for large-scale structure between gravitational waves and radio sources