Detection and estimation of the cosmic dipole with the Einstein Telescope and Cosmic Explorer

Understand

One of the open issues of the standard cosmological model is the value of the cosmic dipole measured from the Cosmic Microwave Background (CMB), as well as from the number count of quasars and radio sources.

• These measurements are currently in tension, with the number count dipole being 2-5 times larger than expected from CMB measurements.
• This discrepancy has been pointed out as a possible indication that the cosmological principle is not valid.
• In this paper, we explore the possibility of detecting and estimating the cosmic dipole with gravitational waves (GWs) from compact binary mergers detected by the future next-generation detectors Einstein Telescope and Cosmic Explorer.