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Power-law Template for Infrared Point-source Clustering

Addison, Graeme E. and Dunkley, Joanna and Hajian, Amir and Viero, Marco and Bond, J. Richard and Das, Sudeep and Devlin, Mark J. and Halpern, Mark and Hincks, Adam D. and Hlozek, Renée and Marriage, Tobias A. and Moodley, Kavilan and Page, Lyman A. and Reese, Erik D. and Scott, Douglas and Spergel, David N. and Staggs, Suzanne T. and Wollack, Edward (2012) Power-law Template for Infrared Point-source Clustering. Astrophysical Journal, 752 (2). Art. No. 120. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20120723-100314140

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Abstract

We 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 ≾ ℓ ≾ 2200), the Balloon-borne Large-Aperture Submillimeter Telescope (BLAST; 250, 350, and 500μm; 1000 ≾ ℓ ≾ 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^(clust)_ℓ ∝ ℓ^(-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^(β)B(ν, T_(eff)), with a single emissivity index β = 2.20 ± 0.07 and effective temperature T_(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 α_(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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-637X/752/2/120DOIArticle
ORCID:
AuthorORCID
Bond, J. Richard0000-0003-2358-9949
Halpern, Mark0000-0002-1760-0868
Page, Lyman A.0000-0002-9828-3525
Reese, Erik D.0000-0002-8700-7082
Scott, Douglas0000-0002-6878-9840
Spergel, David N.0000-0002-5151-0006
Wollack, Edward0000-0002-7567-4451
Additional Information:© 2012 The American Astronomical Society. Received 2011 August 23; accepted 2012 April 13; published 2012 June 4. This work was supported by the U.S. National Science Foundation through awards AST-0408698 for the ACT project, and PHY-0355328, AST-0707731, and PIRE-0507768. G.A. is supported by an STFC studentship and funding was also provided by Princeton University and the University of Pennsylvania, RCUK Fellowship (J.D.), ERC grant 259505 (J.D.), and NASA grant NNX08AH30G (A.H.). ACT. operates in the Chajnantor Science Preserve in Northern Chile under the auspices of the Comisión Nacional de Investigación Científica y Tecnológica (CONICYT). Data acquisition electronics were developed with assistance from the Canada Foundation for Innovation. We thank Matthieu Béthermin for discussions about the B11 IR model, Olivier Doré, Guilaine Lagache, and Bill Jones for discussions about the Planck data, Joaquin Vieira for information about SPT filters, and Gaelen Marsden, Bruce Partridge, and George Efstathiou for helpful suggestions.
Funders:
Funding AgencyGrant Number
NSFAST-0408698
NSFPHY-0355328
NSFAST-0707731
NSFPIRE-0507768
Princeton UniversityUNSPECIFIED
University of PennsylvaniaUNSPECIFIED
European Research Council (ERC)259505
NASANNX08AH30G
Science and Technology Facilities Council (STFC)UNSPECIFIED
Subject Keywords:cosmic background radiation; cosmology: observations; infrared: diffuse background; infrared: galaxies; submillimeter: diffuse background
Issue or Number:2
Record Number:CaltechAUTHORS:20120723-100314140
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120723-100314140
Official Citation:Power-law Template for Infrared Point-source Clustering Graeme E. Addison et al. 2012 ApJ 752 120 This work was supported by the U.S. National Science Foundation through awards AST-0408698 for the ACT project, and PHY-0355328, AST-0707731, and PIRE-0507768. G.A. is supported by an STFC studentship and funding was also provided by Princeton University and the University of Pennsylvania, RCUK Fellowship (J.D.), ERC grant 259505 (J.D.), and NASA grant NNX08AH30G (A.H.). ACT. operates in the Chajnantor Science Preserve in Northern Chile under the auspices of the Comisi´on Nacional de Investigaci´on Cient´ıfica y Tecnol´ogica (CONICYT). Data acquisition electronics were developed with assistance from theCanada Foundation for Innovation.We thank Matthieu B´ethermin for discussions about the B11 IR model, Olivier Dor´e, Guilaine Lagache, and Bill Jones for discussions about the Planck data, Joaquin Vieira for information about SPT filters, and Gaelen Marsden, Bruce Partridge, and George Efstathiou for helpful suggestions.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32632
Collection:CaltechAUTHORS
Deposited By: Aucoeur Ngo
Deposited On:23 Jul 2012 18:41
Last Modified:30 Oct 2020 21:51

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