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Das S, Sherwin BD, Aguirre P, et al. Detection of the power spectrum of cosmic microwave background lensing by the Atacama Cosmology Telescope. Phys Rev Lett. 2011;107(2):021301doi: 10.1103/PhysRevLett.107.021301.
Das, S., Sherwin, B. D., Aguirre, P., Appel, J. W., Bond, J. R., Carvalho, C. S., Devlin, M. J., Dunkley, J., Dünner, R., Essinger-Hileman, T., Fowler, J. W., Hajian, A., Halpern, M., Hasselfield, M., Hincks, A. D., Hlozek, R., Huffenberger, K. M., Hughes, J. P., Irwin, K. D., Klein, J., Kosowsky, A., Lupton, R. H., Marriage, T. A., Marsden, D., Menanteau, F., Moodley, K., Niemack, M. D., Nolta, M. R., Page, L. A., Parker, L., Reese, E. D., Schmitt, B. L., Sehgal, N., Sievers, J., Spergel, D. N., Staggs, S. T., Swetz, D. S., Switzer, E. R., Thornton, R., Visnjic, K., & Wollack, E. (2011). Detection of the power spectrum of cosmic microwave background lensing by the Atacama Cosmology Telescope. Physical review letters, 107(2), 021301. https://doi.org/10.1103/PhysRevLett.107.021301
Das, Sudeep, et al. "Detection of the power spectrum of cosmic microwave background lensing by the Atacama Cosmology Telescope." Physical review letters vol. 107,2 (2011): 021301. doi: https://doi.org/10.1103/PhysRevLett.107.021301
Das S, Sherwin BD, Aguirre P, Appel JW, Bond JR, Carvalho CS, Devlin MJ, Dunkley J, Dünner R, Essinger-Hileman T, Fowler JW, Hajian A, Halpern M, Hasselfield M, Hincks AD, Hlozek R, Huffenberger KM, Hughes JP, Irwin KD, Klein J, Kosowsky A, Lupton RH, Marriage TA, Marsden D, Menanteau F, Moodley K, Niemack MD, Nolta MR, Page LA, Parker L, Reese ED, Schmitt BL, Sehgal N, Sievers J, Spergel DN, Staggs ST, Swetz DS, Switzer ER, Thornton R, Visnjic K, Wollack E. Detection of the power spectrum of cosmic microwave background lensing by the Atacama Cosmology Telescope. Phys Rev Lett. 2011 Jul 08;107(2):021301. doi: 10.1103/PhysRevLett.107.021301. Epub 2011 Jul 05. PMID: 21797590.
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Phys Rev Lett. 2011 Jul 08;107(2):021301. doi: 10.1103/PhysRevLett.107.021301. Epub 2011 Jul 05.

Detection of the power spectrum of cosmic microwave background lensing by the Atacama Cosmology Telescope.

Physical review letters

Sudeep Das, Blake D Sherwin, Paula Aguirre, John W Appel, J Richard Bond, C Sofia Carvalho, Mark J Devlin, Joanna Dunkley, Rolando Dünner, Thomas Essinger-Hileman, Joseph W Fowler, Amir Hajian, Mark Halpern, Matthew Hasselfield, Adam D Hincks, Renée Hlozek, Kevin M Huffenberger, John P Hughes, Kent D Irwin, Jeff Klein, Arthur Kosowsky, Robert H Lupton, Tobias A Marriage, Danica Marsden, Felipe Menanteau, Kavilan Moodley, Michael D Niemack, Michael R Nolta, Lyman A Page, Lucas Parker, Erik D Reese, Benjamin L Schmitt, Neelima Sehgal, Jon Sievers, David N Spergel, Suzanne T Staggs, Daniel S Swetz, Eric R Switzer, Robert Thornton, Katerina Visnjic, Ed Wollack

Affiliations

  1. BCCP, Department of Physics, University of California, Berkeley, California 94720, USA.

PMID: 21797590 DOI: 10.1103/PhysRevLett.107.021301

Abstract

We report the first detection of the gravitational lensing of the cosmic microwave background through a measurement of the four-point correlation function in the temperature maps made by the Atacama Cosmology Telescope. We verify our detection by calculating the levels of potential contaminants and performing a number of null tests. The resulting convergence power spectrum at 2° angular scales measures the amplitude of matter density fluctuations on comoving length scales of around 100 Mpc at redshifts around 0.5 to 3. The measured amplitude of the signal agrees with Lambda cold dark matter cosmology predictions. Since the amplitude of the convergence power spectrum scales as the square of the amplitude of the density fluctuations, the 4σ detection of the lensing signal measures the amplitude of density fluctuations to 12%.

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