Application of the Kolmogorov-Smirnov test to CMB data: Is the universe really weakly random?

Abstract

A recent application of the Kolmogorov-Smirnov test to the WMAP 7 year W-band maps claims evidence that the CMB is "weakly random", and that only 20% of the signal can be explained as a random Gaussian field. I here repeat this analysis, and in contrast to the original result find no evidence for deviation from the standard ΛCDM model. Instead, the results of the original analysis are consistent with not properly taking into account the correlations of the ΛCDM power spectrum.

4 pages, 5 figures, submitted to A&A

References in corpus (7)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Sky Maps, Systematic Errors, and Basic Results
• Kolmogorov cosmic microwave background sky
• A search for concentric circles in the 7-year WMAP temperature sky maps
• Kolmogorov stochasticity parameter measuring the randomness in Cosmic Microwave Background
• No evidence for anomalously low variance circles on the sky
• Kolmogorov analysis detecting radio and Fermi gamma-ray sources in cosmic microwave background maps
• A weakly random Universe?

Cited by in corpus (5)

• A Study of Gas Entropy Profiles of 47 Galaxy Clusters and Groups Out to the Virial Radius
• The Kolmogorov-Smirnov test for the CMB
• On the "Application of the Kolmogorov-Smirnov test to CMB data: Is the universe really weakly random?", by Sigurd K. Næss [arXiv:1105.5051]
• Comprehensible Counterfactual Explanation on Kolmogorov-Smirnov Test
• On the "The Kolmogorov-Smirnov test for the CMB" by M.Frommert, R.Durrer and J.Michaud