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arXiv · 1205.2537

Cosmic Microwave and Infrared Backgrounds cross-correlation for ISW detection

Stéphane Ilic
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Abstract

We investigate the cross-correlation between the cosmic infrared and microwave backgrounds (CIB & CMB) anisotropies through the integrated Sachs-Wolfe effect. We first describe the CIB anisotropies using a linearly biased power spectrum, then derive the theoretical angular power spectrum of the CMB-CIB cross-correlation for different instruments and frequencies. We discuss the detectability of the ISW signal by performing a signal-to-noise (SNR) analysis with our predicted spectra. The significances obtained range from 6{\sigma} to 7{\sigma} in an ideal case, depending on the frequency ; in realistic cases which account for the presence of noise including astrophysical contaminants, the results span the range 2-5{\sigma}, depending strongly on the major contribution to the noise term.

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Stéphane Ilic. 2012-05-11. Cosmic Microwave and Infrared Backgrounds cross-correlation for ISW detection. https://doi.org/10.1088/1742-6596/484/1/012034

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