Correlations in the Far-Infrared Background
Z. Haiman, L. Knox;
ApJ, 2000, 530, 124
ABSTRACT:We compute the expected angular power spectrum of the cosmic far infrared background (FIRB).
We find that the signal due to source correlations
dominates the shot noise for l<~1000 and results in anisotropies with rms
amplitudes l(l+1)Cl/2π1/2 between 5% and 10% of the mean for l>~150.
The angular power
spectrum depends on several unknown quantities, such as the UV flux density
evolution, optical properties of the dust, biasing of the sources of the FIRB, and
cosmological parameters.
However, when we require our models to reproduce the
observed direct current level of the FIRB, we find that the anisotropy is at least
a few percent in all cases.
This anisotropy is detectable with proposed
instruments, and its measurement will provide strong constraints on models of
galaxy evolution and large-scale structure at redshifts up to at least z~5.
KEYWORDS: cosmology: cosmic microwave background, cosmology: diffuse radiation, cosmology: theory, cosmology: observations, galaxies: evolution, galaxies: formation
CODE: haiman2000