THE ATACAMA COSMOLOGY TELESCOPE: LENSING OF CMB TEMPERATURE AND POLARIZATION DERIVED FROM COSMIC INFRARED BACKGROUND CROSS-CORRELATION

Alexander Van Engelen, Blake D. Sherwin, Neelima Sehgal, Graeme E. Addison, Rupert Allison, Nick Battaglia, Francesco De Bernardis, J. Richard Bond, Erminia Calabrese, Kevin Coughlin, Devin Crichton, Rahul Datta, Mark J. Devlin, Joanna Dunkley, Rolando Dünner, Patricio Gallardo, Emily Grace, Megan Gralla, Amir Hajian, Matthew HasselfieldShawn Henderson, J. Colin Hill, Matt Hilton, Adam D. Hincks, Renée Hlozek, Kevin M. Huffenberger, John P. Hughes, Brian Koopman, Arthur Kosowsky, Thibaut Louis, Marius Lungu, Mathew Madhavacheril, Loïc Maurin, Jeff McMahon, Kavilan Moodley, Charles Munson, Sigurd Naess, Federico Nati, Laura Newburgh, Michael D. Niemack, Michael R. Nolta, Lyman A. Page, Christine Pappas, Bruce Partridge, Benjamin L. Schmitt, Jonathan L. Sievers, Sara Simon, David N. Spergel, Suzanne T. Staggs, Eric R. Switzer, Jonathan T. Ward, Edward J. Wollack

Research output: Contribution to journalArticlepeer-review

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Abstract

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 4.5σ. Combining both CMB temperature and polarization data gives a lensing detection at 9.1σ significance. A B-mode polarization lensing signal is present with a significance of 3.2σ We also present the first measurement of CMB lensing-CIB correlation at small scales corresponding to l > 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.

Original languageEnglish (US)
Article number7
JournalAstrophysical Journal
Volume808
Issue number1
DOIs
StatePublished - Jul 20 2015

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • cosmic background radiation
  • cosmology: observations
  • infrared: diffuse background
  • large-scale structure of universe

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