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Determination of microwave background map inhomogeneity from angular power spectrum

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Abstract

We present a new method for analyzing the homogeneity of the microwave background maps, based on the behavior of the angular power spectrum C(ℓ). We realize the power spectrum dispersion variation of the background signal hemisphere in the form of a new map, which characterizes the homogeneity (or inhomogeneity) of the background in the second order. Applying our method we make an analysis of the seven-year WMAP mission signal for the maps with the resolution of ℓ ≤ 100. As a result, we discover the ILC signal asymmetry, linked with the ecliptic coordinate system, also revealed in the signal of the WMAP W-channel data.

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Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 369167, Russia

    Ya. V. Naiden & O. V. Verkhodanov

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  1. Ya. V. Naiden
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  2. O. V. Verkhodanov
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Correspondence to Ya. V. Naiden.

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Original Russian Text © Ya.V. Naiden, O.V. Verkhodanov, 2011, published in Astrofizicheskii Byulleten, 2011, Vol. 66, No. 3, pp. 372–381.

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Naiden, Y.V., Verkhodanov, O.V. Determination of microwave background map inhomogeneity from angular power spectrum. Astrophys. Bull. 66, 345–354 (2011). https://doi.org/10.1134/S1990341311030072

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  • DOI: https://doi.org/10.1134/S1990341311030072

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