The Far-Infrared Background Correlation with CMB Lensing

Details The Far-Infrared Background Correlation with CMB Lensing The Far-Infrared Background Correlation with CMB Lensing

2002-08-30

arxiv.org/abs/astro-ph/0209001v1

Astrophys.J.590:664-672,2003

Astronomy and Astrophysics

Astrophysics

9 pages, 5 figures, submitted to ApJ

Scientific paper

10.1086/375188

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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