Power-Law Template for IR Point Source Clustering
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 500 um; 1000 < l < 9000...
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ftdatacite:10.48550/arxiv.1108.4614 2023-05-15T18:23:00+02:00 Power-Law Template for IR Point Source Clustering Addison, Graeme E. Dunkley, Joanna Hajian, Amir Viero, Marco Bond, J. Richard Das, Sudeep Devlin, Mark Halpern, Mark Hincks, Adam Hlozek, Renée Marriage, Tobias A. Moodley, Kavilan Page, Lyman A. Reese, Erik D. Scott, Douglas Spergel, David N. Staggs, Suzanne T. Wollack, Edward 2011 https://dx.doi.org/10.48550/arxiv.1108.4614 https://arxiv.org/abs/1108.4614 unknown arXiv https://dx.doi.org/10.1088/0004-637x/752/2/120 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences article-journal Article ScholarlyArticle Text 2011 ftdatacite https://doi.org/10.48550/arxiv.1108.4614 https://doi.org/10.1088/0004-637x/752/2/120 2022-04-01T14:02:56Z 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 500 um; 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 fit by a simple power law of the form C_l \propto 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, nu^beta B(nu,T_eff), with a single emissivity index beta = 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 alpha_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. : 11 pages, 4 figures. Published in ApJ Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences Addison, Graeme E. Dunkley, Joanna Hajian, Amir Viero, Marco Bond, J. Richard Das, Sudeep Devlin, Mark Halpern, Mark Hincks, Adam Hlozek, Renée Marriage, Tobias A. Moodley, Kavilan Page, Lyman A. Reese, Erik D. Scott, Douglas Spergel, David N. Staggs, Suzanne T. Wollack, Edward Power-Law Template for IR Point Source Clustering |
topic_facet |
Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
description |
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 500 um; 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 fit by a simple power law of the form C_l \propto 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, nu^beta B(nu,T_eff), with a single emissivity index beta = 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 alpha_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. : 11 pages, 4 figures. Published in ApJ |
format |
Text |
author |
Addison, Graeme E. Dunkley, Joanna Hajian, Amir Viero, Marco Bond, J. Richard Das, Sudeep Devlin, Mark Halpern, Mark Hincks, Adam Hlozek, Renée Marriage, Tobias A. Moodley, Kavilan Page, Lyman A. Reese, Erik D. Scott, Douglas Spergel, David N. Staggs, Suzanne T. Wollack, Edward |
author_facet |
Addison, Graeme E. Dunkley, Joanna Hajian, Amir Viero, Marco Bond, J. Richard Das, Sudeep Devlin, Mark Halpern, Mark Hincks, Adam Hlozek, Renée Marriage, Tobias A. Moodley, Kavilan Page, Lyman A. Reese, Erik D. Scott, Douglas Spergel, David N. Staggs, Suzanne T. Wollack, Edward |
author_sort |
Addison, Graeme E. |
title |
Power-Law Template for IR Point Source Clustering |
title_short |
Power-Law Template for IR Point Source Clustering |
title_full |
Power-Law Template for IR Point Source Clustering |
title_fullStr |
Power-Law Template for IR Point Source Clustering |
title_full_unstemmed |
Power-Law Template for IR Point Source Clustering |
title_sort |
power-law template for ir point source clustering |
publisher |
arXiv |
publishDate |
2011 |
url |
https://dx.doi.org/10.48550/arxiv.1108.4614 https://arxiv.org/abs/1108.4614 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1088/0004-637x/752/2/120 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1108.4614 https://doi.org/10.1088/0004-637x/752/2/120 |
_version_ |
1766202422981558272 |