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

2011; IOP Publishing; Volume: 729; Issue: 1 Linguagem: Inglês

10.1088/0004-637x/729/1/62

1538-4357

Sudeep Das, Tobias A. Marriage, P. A. R. Ade, Paula Aguirre, M. Amiri, John W. Appel, L. Felipe Barrientos, E. S. Battistelli, John Bond, Ben Brown, B. Burger, Jay Chervenak, Mark J. Devlin, Simon Dicker, W. B. Doriese, Joanna Dunkley, Rolando Dünner, Thomas Essinger-Hileman, R. P. Fisher, Joseph W. Fowler, Amir Hajian, M. Halpern, Matthew Hasselfield, Carlos Hernández-Monteagudo, G. C. Hilton, Matt Hilton, Adam D. Hincks, Renée Hložek, K. M. Huffenberger, David H. Hughes, John P. Hughes, L. Infante, K. D. Irwin, Jean Baptiste Juin, Madhuri Kaul, Jeff Klein, Arthur Kosowsky, Judy M. Lau, M. Limon, Yen‐Ting Lin, Robert H. Lupton, Danica Marsden, Krista Martocci, P. Mauskopf, F. Menanteau, Kavilan Moodley, H. Moseley, Calvin B. Netterfield, Michael D. Niemack, Michael R. Nolta, Lyman A. Page, Lucas Parker, Bruce Partridge, Beth Reid, Neelima Sehgal, Blake D. Sherwin, Jonathan Sievers, David N. Spergel, Suzanne T. Staggs, Daniel S. Swetz, Eric R. Switzer, Robert Thornton, Hy Trac, C. Tucker, Ryan Warne, Edward J. Wollack, Yue Zhao,

Galaxies: Formation, Evolution, Phenomena

We present measurements of the cosmic microwave background (CMB) power spectrum made by the Atacama Cosmology Telescope at 148 GHz and 218 GHz, 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 {\Lambda}CDM 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 2.8{\sigma} level. We also detect a low level of Galactic dust in our maps, which demonstrates that we can recover known faint, diffuse signals.