SKA and the Cosmic Radio Dipole

TL;DR

This paper explores how the Square Kilometre Array can measure the cosmic radio dipole to test the fundamental assumption of the cosmological principle and compare the cosmic rest frames at different epochs.

Contribution

It assesses the potential of SKA continuum surveys to accurately measure the cosmic radio dipole and test the consistency of cosmic rest frames.

Findings

Potential to measure the cosmic radio dipole with SKA

Ability to test the cosmological principle

Comparison of cosmic rest frames at different times

Abstract

We study the prospects to measure the cosmic radio dipole by means of continuum surveys with the Square Kilometre Array. Such a measurement will allow a critical test of the cosmological principle. It will test whether the cosmic rest frame defined by the cosmic microwave background at photon decoupling agrees with the cosmic rest frame of matter at late times.