THE ATACAMA COSMOLOGY TELESCOPE: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND POWER SPECTRUM AT 148 AND 218 GHz FROM THE 2008 SOUTHERN SURVEY

Journal article

We present measurements of the cosmic microwave background (CMB) power spectrum made by the Atacama Cosmology Telescope at 148GHz and 218GHz, as well as the cross-frequency spectrum between the two channels. Our results clearly show the second through the seventh acoustic peaks in the CMB power spectrum. The measurements of these higher-order peaks provide an additional test of the ΛCDM cosmological model. At ℓ>3000, we detect power in excess of the primary anisotropy spectrum of the CMB. At lower multipoles 500 < ℓ < 3000, we find evidence for gravitational lensing of the CMB in the power spectrum at the 2.8σ level. We also detect a low level of Galactic dust in our maps, which demonstrates that we can recover known faint, diffuse signals. © 2011. The American Astronomical Society. All rights reserved.

Authors: Das, S; Marriage, T; Ade, P; Aguirre, P; Amiri, M

• Publication status: Published
• Publisher: Institute of Physics Publishing
• Journal: ASTROPHYSICAL JOURNAL
• Volume: 729
• Issue: 1
• Pages: 62-62
• Publication date: 2011-03-01
• DOI: 10.1088/0004-637X/729/1/62
• EISSN: 1538-4357
• ISSN: 0004-637X
• Language: English
• Keywords: cosmology: observations; cosmic background radiation