Letter to the Editor

Plane-mirroring anomaly in the cosmic microwave background maps

¹ Yerevan Physics Institute and Yerevan State University, Yerevan, Armenia e-mail: gurzadya@icra.it
² School of Mathematical Sciences, Monash University, Clayton, Australia
³ University of Lecce, Lecce, Italy

Received: 5 February 2009
Accepted: 16 March 2009

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 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.