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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

Das, Sudeep, Marriage, Tobias A., Ade, Peter A. R., Aguirre, Paula, Amiri, Mandana, Appel, John W., Barrientos, L. Felipe, Battistelli, Elia S., Bond, John R., Brown, Ben, Burger, Bryce, Chervenak, Jay, Devlin, Mark J., Dicker, Simon R., Doriese, W. Bertrand, Dunkley, Joanna, Dünner, Rolando, Essinger-Hileman, Thomas, Fisher, Ryan P., Fowler, Joseph W., Hajian, Amir, Halpern, Mark, Hasselfield, Matthew, Hernández-Monteagudo, Carlos, Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Huffenberger, Kevin M., Hughes, David H., Hughes, John P., Infante, Leopoldo, Irwin, Kent D., Juin, Jean Baptiste, Kaul, Madhuri, Klein, Jeff, Kosowsky, Arthur, Lau, Judy M., Limon, Michele, Lin, Yen-Ting, Lupton, Robert H., Marsden, Danica, Martocci, Krista, Mauskopf, Philip Daniel, Menanteau, Felipe, Moodley, Kavilan, Moseley, Harvey, Netterfield, Calvin B., Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Parker, Lucas, Partridge, Bruce, Reid, Beth, Sehgal, Neelima, Sherwin, Blake D., Sievers, Jon, Spergel, David N., Staggs, Suzanne T., Swetz, Daniel S., Switzer, Eric R., Thornton, Robert, Trac, Hy, Tucker, Carole Elizabeth, Warne, Ryan, Wollack, Ed and Zhao, Yue 2011. The Atacama Cosmology Telescope: a measurement of the cosmic microwave background power spectrum at 148 and 218 GHz from the 2008 southern survey. Astrophysical Journal 729 (1) , 62. 10.1088/0004-637X/729/1/62

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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 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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: cosmic background radiation; cosmology: observations
Publisher: Institute of Physics
ISSN: 0004-637X
Last Modified: 23 Jan 2020 03:50

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