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H-ATLAS: The cosmic abundance of dust from the far-infrared background power spectrum

Thacker, C., Cooray, A., Smidt, J., De Bernardis, F., Mitchell-Wynne, K., Amblard, A., Auld, Robbie Richard, Baes, M., Clements, D. L., Dariush, A., De Zotti, G., Dunne, Loretta, Eales, Stephen Anthony, Hopwood, R., Hoyos, C., Ibar, E., Jarvis, M., Maddox, Steve, Michałowski, M. J., Pascale, Enzo, Scott, D., Serjeant, S., Smith, Matthew William L., Valiante, Elisabetta and van der Werf, P. 2013. H-ATLAS: The cosmic abundance of dust from the far-infrared background power spectrum. The Astrophysical Journal 768 (1) , 58. 10.1088/0004-637X/768/1/58

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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 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 arcmin 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. Integrating over the dusty galaxy population responsible for the background anisotropies, we find that the cosmic abundance of dust, relative to the critical density, to be between Ωdust = 10–6 and 8 × 10–6 in the redshift range z ~ 0-3. This dust abundance is consistent with estimates of the dust content in the universe using quasar reddening and magnification measurements in the Sloan Digital Sky Survey.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: cosmology: observations; galaxies: evolution; infrared: galaxies; large-scale structure of universe; submillimeter: galaxies
Publisher: IOP Science
ISSN: 0004-637X
Last Modified: 04 Jun 2017 05:50
URI: http://orca.cf.ac.uk/id/eprint/54040

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