Hot pixel contamination in the CMB correlation function?

Abstract

Recently, it was suggested that the map-making procedure, which is applied to the time-ordered CMB data by the WMAP team, might be flawed by hot pixels. This could lead to a bias in the pixels having an angular distance of about 141 degrees from hot pixels due to the differential measuring process of the satellite WMAP. Here, the bias is confirmed, and the temperature two-point correlation function C(theta) is reevaluated by excluding the affected pixels. It is shown that the most significant effect occurs in C(theta) at the largest angles near theta = 180 degrees. Furthermore, the corrected correlation function C(theta) is applied to the cubic topology of the Universe, and it is found that such a multi-connected universe matches the temperature correlation better than the LCDM concordance model, provided the cubic length scale is close to L=4 measured in units of the Hubble length.

References in corpus (6)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic Foreground Emission
• No large-angle correlations on the non-Galactic microwave sky
• Do we Live in a "Small Universe"?
• Systematic Distortion in Cosmic Microwave Background Maps

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• The size of the Universe according to the Poincare dodecahedral space hypothesis
• Deep redshift topological lensing: strategies for the T^3 candidate
• Cosmic microwave anisotropies in an inhomogeneous compact flat universe
• Ellipticity of Structures in CMB Sky Maps
• Reconstruction of Missing Data using Iterative Harmonic Expansion
• A measure on the set of compact Friedmann-Lemaitre-Robertson-Walker models
• Diagnosing Timing Error in WMAP Data