Plane-mirroring anomaly in the cosmic microwave background maps

TL;DR

This paper investigates an anomalous plane-mirror symmetry in CMB maps, revealing unexpected properties that challenge cosmological explanations and suggest new tests for dark energy and inhomogeneities.

Contribution

It demonstrates that the observed symmetry in CMB maps has unique properties inconsistent with simple cosmological origins, proposing new avenues for testing dark energy models.

Findings

Symmetry regions show identical Kolmogorov stochasticity parameters.

These regions differ from other sky areas in randomness measures.

Results suggest non-cosmological or complex origins for the symmetry.

Abstract

The plane-mirror symmetry previously noticed in the Cosmic Microwave Background (CMB) temperature anisotropy maps of Wilkinson Microwave Anisotropy Probe is shown to possess certain anomalous properties. The degree of the randomness determined by the Kolmogorov stochasticity parameter in the both symmetry regions appears to have identical values which, however, essentially differ from the corresponding values for other sky regions. If the mirroring were of cosmological origin, this would imply either additional randomizing properties in those directions of the Universe or their different line-of-sight depth. This analysis also provides a way to test the hypothesis of a link between the nature of dark energy and inhomogeneities.