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The atacama cosmology telescope: lensing of CMB temperature and polarization derived from cosmic infrared background cross-correlation

Engelen, Alexander van, Sherwin, Blake D., Sehgal, Neelima, Addison, Graeme E., Allison, Rupert, Battaglia, Nick, Bernardis, Francesco de, Bond, J. Richard, Calabrese, Erminia ORCID:, Coughlin, Kevin, Crichton, Devin, Datta, Rahul, Devlin, Mark J., Dunkley, Joanna, Dünner, Rolando, Gallardo, Patricio, Grace, Emily, Gralla, Megan, Hajian, Amir, Hasselfield, Matthew, Henderson, Shawn, Hill, J. Colin, Hilton, Matt, Hincks, Adam D., Hlozek, Renée, Huffenberger, Kevin M., Hughes, John P., Koopman, Brian, Kosowsky, Arthur, Louis, Thibaut, Lungu, Marius, Madhavacheril, Mathew, Maurin, Loïc, McMahon, Jeff, Moodley, Kavilan, Munson, Charles, Naess, Sigurd, Nati, Federico, Newburgh, Laura, Niemack, Michael D., Nolta, Michael R., Page, Lyman A., Pappas, Christine, Partridge, Bruce, Schmitt, Benjamin L., Sievers, Jonathan L., Simon, Sara, Spergel, David N., Staggs, Suzanne T., Switzer, Eric R., Ward, Jonathan T. and Wollack, Edward J. 2015. The atacama cosmology telescope: lensing of CMB temperature and polarization derived from cosmic infrared background cross-correlation. The Astrophysical Journal 808 (1) , 7. 10.1088/0004-637X/808/1/7

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We present a measurement of the gravitational lensing of the Cosmic Microwave Background (CMB) temperature and polarization fields obtained by cross-correlating the reconstructed convergence signal from the first season of Atacama Cosmology Telescope Polarimeter data at 146 GHz with Cosmic Infrared Background (CIB) fluctuations measured using the Planck satellite. Using an effective overlap area of 92.7 square degrees, we detect gravitational lensing of the CMB polarization by large-scale structure at a statistical significance of $4.5\sigma $. Combining both CMB temperature and polarization data gives a lensing detection at $9.1\sigma $ significance. A B-mode polarization lensing signal is present with a significance of $3.2\sigma $. We also present the first measurement of CMB lensing–CIB correlation at small scales corresponding to $l\gt 2000$. Null tests and systematic checks show that our results are not significantly biased by astrophysical or instrumental systematic effects, including Galactic dust. Fitting our measurements to the best-fit lensing-CIB cross-power spectrum measured in Planck data, scaled by an amplitude A, gives $A={1.02}_{-0.08}^{+0.12}$(stat.) ± 0.06(syst.), consistent with the Planck results.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Publisher: IOP Publishing
ISSN: 15384357
Date of First Compliant Deposit: 7 September 2017
Date of Acceptance: 22 May 2015
Last Modified: 05 May 2023 13:14

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