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The Far-Infrared Background Correlation with CMB Lensing

Yong-Seon Song·Asantha Cooray·Lloyd Knox·Matias Zaldarriaga
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Abstract

The intervening large--scale structure distorts cosmic microwave background (CMB) anisotropies via gravitational lensing. The same large--scale structure, traced by dusty star--forming galaxies, also induces anisotropies in the far--infrared background (FIRB). We investigate the resulting inter--dependence of the FIRB and CMB with a halo model for the FIRB. In particular, we calculate the cross--correlation between the lensing potential and the FIRB. The lensing potential can be quadratically estimated from CMB temperature and/or polarization maps. We show that the cross--correlation can be measured with high signal--to--noise with data from the Planck Surveyor. We discuss how such a measurement can be used to understand the nature of FIRB sources and their relation to the distribution of dark matter.

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Yong-Seon Song, Asantha Cooray, Lloyd Knox, Matias Zaldarriaga. 2002-08-30. The Far-Infrared Background Correlation with CMB Lensing. https://doi.org/10.1086/375188

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