The dipole of the astrophysical gravitational-wave background

Abstract One of the main pillars ?CDM model is Cosmological Principle, which states that our Universe statistically isotropic and homogeneous on large scales. Here we test this hypothesis using Astrophysical Gravitational Wave Background (AGWB) expected to be measured by Einstein Telescope-Cosmic Explorer network; in particular perform a numerical computation AGWB dipole, evaluating intrinsic contribution due clustering kinematic effect induced observer motion. We apply component separation technique GW context disentangle dipole shot noise (SN), based observation at different frequencies. show how can also implemented matched-filtering minimize covariance accounts for both instrumental SN. Since detectors are essentially full-sky, expect powerful tool help testing isotropy next future.