Confirmation of the Copernican principle at Gpc radial scale and above from the kinetic Sunyaev Zel'dovich effect power spectrum

Understand

The Copernican principle, a cornerstone of modern cosmology, remains largely unproven at Gpc radial scale and above.

• Here we will show that, violations of this type will inevitably cause a first order anisotropic kinetic Sunyaev Zel'dovich (kSZ) effect.
• If large scale radial inhomogeneities have amplitude large enough to explain the "dark energy" phenomena, the induced kSZ power spectrum will be much larger than the ACT/SPT upper limit.
• This single test confirms the Copernican principle and rules out the adiabatic void model as a viable alternative to dark energy.