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Power-law template for infrared point-source clustering
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dunkley, Joanna Hlozek, Renee Hajian, Amir Addison, Graeme E. Moodley, Kavilan Reese, Erik D. Hincks, Adam D. Bond, J. Richard Devlin, Mark J. Page, Lyman A. Spergel, David N. Viero, Marco Wollack, Edward Halpern, Mark Das, Sudeep Scott Sr., Douglas Staggs, Suzanne T. Marriage, Tobias A. |
| Copyright Year | 2012 |
| 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 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 ân) 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. |
| File Size | 288521 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140006623 |
| Archival Resource Key | ark:/13960/t6g21073f |
| Language | English |
| Publisher Date | 2012-06-20 |
| Access Restriction | Open |
| Subject Keyword | Cosmic Background Radiation Diffuse Background Submillimeter Cosmic Microwave Background Radiation Galactic Clusters Balloon-borne Instruments Infrared Sources Astronomy Power Spectra Infrared Radiation Infrared Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
