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Tessellated mapping of cosmic background radiation correlations and source distributions

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Abstract

We offer a method of correlations mapping on the full celestial sphere that allows to check the quality of reconstructed maps, their non-Gaussianity and conduct experiments in various frequency ranges. The method was evaluated on the WMAP data, both on the reconstructed maps and foreground components, and on the NRAO VLA Sky Survey (NVSS) data. We detected a significant shift in the correlation data of the dust component, which can be preconditioned by a more complex dust model than the one currently in use for component separation. While studying the NVSS correlation data, we demonstrated that the statistics of the coinciding spots in the microwave background and in the NVSS survey corresponds to the one expected in the ΛCDM model. This can testify for a chance coincidence of the spots in the NVSS and WMAP data in the CMB Cold Spot region. Our method is software-implemented in the GLESP package.

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Authors and Affiliations

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

    O. V. Verkhodanov, M. L. Khabibullina & E. K. Majorova

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  1. O. V. Verkhodanov
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  2. M. L. Khabibullina
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  3. E. K. Majorova
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Correspondence to O. V. Verkhodanov.

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Original Russian Text © O.V. Verkhodanov, M.L. Khabibullina, E.K. Majorova, 2009, published in Astrofizicheskij Byulleten, 2009, Vol. 64, No. 3, pp. 272–279.

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Verkhodanov, O.V., Khabibullina, M.L. & Majorova, E.K. Tessellated mapping of cosmic background radiation correlations and source distributions. Astrophys. Bull. 64, 263–269 (2009). https://doi.org/10.1134/S1990341309030055

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  • DOI: https://doi.org/10.1134/S1990341309030055

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