Searching for anisotropy in the distribution of binary black hole mergers

Abstract

The standard model of cosmology is underpinned by the assumption of the statistical isotropy of the Universe. Observations of the cosmic microwave background, galaxy distributions, and supernovae, among other media, support the assumption of isotropy at scales $\gtrsim 100$\,Mpc. The recent detections of gravitational waves from merging stellar-mass binary black holes provide a new probe of anisotropy; complementary and independent of all other probes of the matter distribution in the Universe. We present an analysis using a spherical harmonic model to determine the level of anisotropy in the first LIGO/Virgo transient catalog. We find that the ten binary black hole mergers within the first transient catalog are consistent with an isotropic distribution. We carry out a study of simulated events to assess the prospects for future probes of anisotropy. Within a single year of operation, third-generation gravitational-wave observatories will probe anisotropies with an angular scale of $\sim 36^{\circ }$ at the level of $\lesssim 0.1\%$.

arXiv comment13 pages, 9 figures Updated reviews and minor typos

References in corpus (48)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• The Cosmological Constant and Dark Energy
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
• dynesty: A Dynamic Nested Sampling Package for Estimating Bayesian Posteriors and Evidences
• GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
• The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
• Gravitational Waves from Mergin Compact Binaries: How Accurately Can One Extract the Binary's Parameters from the Inspiral Waveform?
• Characterization of the LIGO detectors during their sixth science run
• Science Case for the Einstein Telescope
• Bilby: A user-friendly Bayesian inference library for gravitational-wave astronomy
• Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo
• Bayesian inference for compact binary coalescences with BILBY: Validation and application to the first LIGO--Virgo gravitational-wave transient catalogue
• Detection of non-Gaussianity in the WMAP 1-year data using spherical wavelets
• Planck 2018 results. VII. Isotropy and Statistics of the CMB
• An introduction to Bayesian inference in gravitational-wave astronomy: parameter estimation, model selection, and hierarchical models
• Consistently Large Cosmic Flows on Scales of 100 Mpc/h: a Challenge for the Standard LCDM Cosmology
• Networks of gravitational wave detectors and three figures of merit
• Cosmic homogeneity demonstrated with luminous red galaxies
• Hemispherical power asymmetry in the three-year Wilkinson Microwave Anisotropy Probe sky maps
• Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove
• Evidence for anisotropy of cosmic acceleration
• A new measurement of the bulk flow of X-ray luminous clusters of galaxies
• Probing cosmic isotropy with a new X-ray galaxy cluster sample through the $L_{\text{X}}-T$ scaling relation
• Probing the theory of gravity with gravitational lensing of gravitational waves and galaxy surveys
• Detection of the velocity dipole in the radio galaxies of the NRAO VLA Sky Survey
• (An)isotropy of the Hubble diagram: comparing hemispheres
• The Large-Scale Smoothness of the Universe
• Directional limits on persistent gravitational waves from Advanced LIGO's first observing run
• Dust Versus Cosmic Acceleration
• Probing the anisotropies of a stochastic gravitational-wave background using a network of ground-based laser interferometers
• From Bright Binaries To Bumpy Backgrounds: Mapping Realistic Gravitational Wave Skies With Pulsar-Timing Arrays
• Testing homogeneity on large scales in the Sloan Digital Sky Survey Data Release One
• Directional limits on persistent gravitational waves using data from Advanced LIGO's first two observing runs
• Time-dependence of the astrophysical stochastic gravitational wave background
• Constraining black-hole spins with gravitational wave observations
• The Scale of Cosmic Isotropy
• Is the expansion of the universe accelerating? All signs still point to yes a local dipole anisotropy cannot explain dark energy
• Anisotropy in the all-sky distribution of galaxy morphological types
• Gravitational-wave inference in the catalog era: evolving priors and marginal events
• A dipole anisotropy of galaxy distribution: Does the CMB rest-frame exist in the local universe?
• Improved limits on a stochastic gravitational-wave background and its anisotropies from Advanced LIGO O1 and O2 runs
• Very fast stochastic gravitational wave background map making using folded data
• Are stellar--mass binary black hole mergers isotropically distributed?
• Observational Selection Effects with Ground-based Gravitational Wave Detectors
• Beyond the classical distance-redshift test: cross-correlating redshift-free standard candles and sirens with redshift surveys
• Measuring angular N-point correlations of binary black hole merger gravitational-wave events with hierarchical Bayesian inference
• Two-dimensional correlation function of binary black hole coalescences

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• Combining chirp mass, luminosity distance and sky localisation from gravitational wave events to detect the cosmic dipole
• Probing the large-scale structure of the universe through gravitational-wave observations
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