Journal
ASTROPHYSICAL JOURNAL
Volume 718, Issue 2, Pages 632-646Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/718/2/632
Keywords
cosmic background radiation; galaxies: abundances; large-scale structure of universe; submillimeter: diffuse background; submillimeter: galaxies
Categories
Funding
- National Science Foundation (NSF) [ANT-0638937, ANT-0130612, PHY-0114422]
- United States Antarctic Program
- Raytheon Polar Services Company
- Kavli Foundation
- Gordon and Betty Moore Foundation
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- National Sciences and Engineering Research Council of Canada
- Quebec Fonds de recherche sur la nature et les technologies
- Canadian Institute for Advanced Research
- Fermi Fellowship
- GAAN Fellowship
- Miller Institute for Basic Research in Science, University of California Berkeley
- Alfred P. Sloan Research Fellowship
- KICP Fellowships
- STFC [ST/G002711/1] Funding Source: UKRI
Ask authors/readers for more resources
We use data from the first 100 deg(2) field observed by the South Pole Telescope (SPT) in 2008 to measure the angular power spectrum of temperature anisotropies contributed by the background of dusty star-forming galaxies (DSFGs) at millimeter wavelengths. From the auto- and cross-correlation of 150 and 220 GHz SPT maps, we significantly detect both Poisson distributed and, for the first time at millimeter wavelengths, clustered components of power from a background of DSFGs. The spectral indices of the Poisson and clustered components are found to be (alpha) over bar alpha(P)(150-220) = 3.86 +/- 0.23 and alpha(C)(150-220) = 3.8 +/- 1.3, implying a steep scaling of the dust emissivity index beta similar to 2. The Poisson and clustered power detected in SPT, BLAST (at 600, 860, and 1200 GHz), and Spitzer (1900 GHz) data can be understood in the context of a simple model in which all galaxies have the same graybody spectrum with dust emissivity index of beta = 2 and dust temperature T-d = 34 K. In this model, half of the 150 GHz background light comes from redshifts greater than 3.2. We also use the SPT data to place an upper limit on the amplitude of the kinetic Sunyaev-Zel'dovich power spectrum at l = 3000 of 13 mu K-2 at 95% confidence.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available