Dipole Anisotropy in Gravitational Wave Source Distribution

Abstract

Our local motion with respect to the cosmic frame of rest is believed to be dominantly responsible for the observed dipole anisotropy in the Cosmic Microwave Background Radiation (CMBR). We study the effect of this motion on the sky distribution of gravitational wave (GW) sources. We determine the resulting dipole anisotropy in GW source number counts, mass weighted number counts, which we refer to as mass intensity, and mean mass per source. The mass M dependence of the number density n(M) distribution of BBH is taken directly from the data. We also test the anisotropy in the observable mean mass per source along the direction of the CMB dipole. The current data sample is relatively small and consistent with isotropy. The number of sources required for this test is likely to become available in the near future.

References in corpus (18)

• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Advanced LIGO
• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Robust parameter estimation for compact binaries with ground-based gravitational-wave observations using the LALInference software library
• Challenges for $\Lambda$CDM: An update
• A Test of the Cosmological Principle with Quasars
• GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• A Gravitational Wave Detector with Cosmological Reach
• Dipoles in the Sky
• The Science Case for LIGO-India
• Does Matter Matter? Using the mass distribution to distinguish neutron stars and black holes
• Detecting the Cosmic Dipole Anisotropy in Large-Scale Radio Surveys
• An Isotropy Measurement with Gravitational Wave Observations
• Detection and estimation of the cosmic dipole with the Einstein Telescope and Cosmic Explorer
• Superhorizon perturbations: A possible explanation of the Hubble--Lemaître Tension and the Large Scale Anisotropy of the Universe
• Two-dimensional correlation function of binary black hole coalescences

Cited by in corpus (2)

• Boosting gravitational waves: a review of kinematic effects on amplitude, polarization, frequency and energy density
• Combining chirp mass, luminosity distance and sky localisation from gravitational wave events to detect the cosmic dipole