Hot pixel contamination in the CMB correlation function?

R Aurich (1) , S Lustig (1) , F Steiner (1)

1 Institut für Theoretische Physik

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 @BULLET 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(ϑ) is reevaluated by excluding the affected pixels. It is shown that the most significant effect occurs in C(ϑ) at the largest angles near ϑ = 180 @BULLET. Furthermore, the corrected correlation function C(ϑ) 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 ΛCDM concordance model, provided the cubic length scale is close to L = 4 measured in units of the Hubble length.

Mots clés: 98.80.-k; 98.70.Vc; 98.80.Es

R Aurich, S Lustig, F Steiner. Hot pixel contamination in the CMB correlation function?. Classical and Quantum Gravity, 2010, 27 (9), pp.95009. ⟨10.1088/0264-9381/27/9/095009⟩. ⟨hal-00591188⟩