H-Atlas: The cosmic abundance of dust from the far-infrared background power spectrum
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Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Science
Abstract
We present a measurement of the angular power spectrum of the cosmic far-infrared background
(CFIRB) anisotropies in one of the extragalactic fields of the Herschel Astrophysical Terahertz Large
Area Survey (H-ATLAS) at 250, 350 and 500 μm bands. Consistent with recent measurements of
the CFIRB power spectrum in Herschel-SPIRE maps, we confirm the existence of a clear one-halo
term of galaxy clustering on arcminute angular scales with large-scale two-halo term of clustering
at 30 arcminutes to angular scales of a few degrees. The power spectrum at the largest angular
scales, especially at 250 μm, is contaminated by the Galactic cirrus. The angular power spectrum
is modeled using a conditional luminosity function approach to describe the spatial distribution of
unresolved galaxies that make up the bulk of the CFIRB.
Description
Keywords
Cosmology, Observations, Submillimeter, Galaxies, Infrared
Citation
Thacker, C. et al. (2013). H-Atlas: The cosmic abundance of dust from the far-infrared background power spectrum. Astrophysical Journal Letters, 768(1)