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Power-Law Template for Infrared Point-Source ClusteringWe perform a combined fit to angular power spectra of unresolved infrared (IR) point sources from the Planck satellite (at 217, 353, 545, and 857 GHz, over angular scales 100 approx < l approx < 2200), the Balloon-borne Large-Aperture Submillimeter Telescope (BLAST; 250, 350, and 500 micron; 1000 approx < l approx < 9000), and from correlating BLAST and Atacama Cosmology Telescope (ACT; 148 and 218 GHz) maps. We find that the clustered power over the range of angular scales and frequencies considered is well fitted by a simple power law of the form C(sup clust)(sub l) varies as l (sub −n) with n = 1.25 +/- 0.06. While the IR sources are understood to lie at a range of redshifts, with a variety of dust properties, we find that the frequency dependence of the clustering power can be described by the square of a modified blackbody, ν(sup Beta)B(ν, T(sub eff) ), with a single emissivity index Beta = 2.20 +/- 0.07 and effective temperature T(sub eff) = 9.7 K. Our predictions for the clustering amplitude are consistent with existing ACT and South Pole Telescope results at around 150 and 220 GHz, as is our prediction for the effective dust spectral index, which we find to be alpha(sub 150-220) = 3.68 +/- 0.07 between 150 and 220 GHz. Our constraints on the clustering shape and frequency dependence can be used to model the IR clustering as a contaminant in cosmic microwave background anisotropy measurements. The combined Planck and BLAST data also rule out a linear bias clustering model.
Document ID
20140006623
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1088/0004-637X/752/2/120
Authors
Addison, Graeme E (Oxford Univ. Oxford, United Kingdom)
Dunkley, Joanna (Oxford Univ. Oxford, United Kingdom)
Hajian, Amir (Princeton Univ. NJ, United States)
Viero, Marco (California Inst. of Tech. Pasadena, CA, United States)
Bond, J. Richard (Toronto Univ. Ontario, Canada)
Das, Sudeep (Princeton Univ. NJ, United States)
Devlin, Mark J. (Pennsylvania Univ. Philadelphia, PA, United States)
Halpern, Mark (British Columbia Univ. Vancouver, British Columbia, Canada)
Hincks, Adam D (Princeton Univ. NJ, United States)
Hlozek, Renee (Princeton Univ. NJ, United States)
Marriage, Tobias A. (Princeton Univ. NJ, United States)
Moodley, Kavilan (KwaZulu-Natal Univ. Durban, South Africa)
Page, Lyman A. (Princeton Univ. NJ, United States)
Reese, Erik D. (Pennsylvania Univ. Philadelphia, PA, United States)
Scott, Douglas (British Columbia Univ. Vancouver, British Columbia, Canada)
Spergel, David N. (Princeton Univ. NJ, United States)
Staggs, Suzanne T. (Princeton Univ. NJ, United States)
Wollack, Edward (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
June 3, 2014
Publication Date
June 20, 2012
Publication Information
Publication: Astrophysical Journal
Publisher: Astrophysical Journal
Volume: 752
Issue: 2
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN9464
Funding Number(s)
CONTRACT_GRANT: NSF AST-0707731
CONTRACT_GRANT: NSF PIRE-0507768
CONTRACT_GRANT: ERC 259505
CONTRACT_GRANT: NSF AST-0408698
CONTRACT_GRANT: NSF PHY-0355328
CONTRACT_GRANT: NNX08AH30G
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
cosmic background radiation
diffuse background
submillimeter

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