The atacama cosmology telescope: A measurement of the cosmic microwave background power spectrum at 148 and 218 ghz from the 2008 southern survey

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

Research output: Contribution to journalArticlepeer-review

139 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number62
JournalAstrophysical Journal
Volume729
Issue number1
DOIs
StatePublished - Mar 1 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • color figures
  • cosmic background radiation cosmology
  • observations Online-only material

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