Two-season Atacama Cosmology Telescope polarimeter lensing power spectrum

Blake D. Sherwin, Alexander Van Engelen, Neelima Sehgal, Mathew Madhavacheril, Graeme E. Addison, Simone Aiola, Rupert Allison, Nicholas Battaglia, Daniel T. Becker, James A. Beall, J. Richard Bond, Erminia Calabrese, Rahul Datta, Mark J. Devlin, Rolando Dünner, Joanna Dunkley, Anna E. Fox, Patricio Gallardo, Mark Halpern, Matthew HasselfieldShawn Henderson, J. Colin Hill, Gene C. Hilton, Johannes Hubmayr, John P. Hughes, Adam D. Hincks, Renée Hlozek, Kevin M. Huffenberger, Brian Koopman, Arthur Kosowsky, Thibaut Louis, Loïc Maurin, Jeff McMahon, Kavilan Moodley, Sigurd Naess, Federico Nati, Laura Newburgh, Michael D. Niemack, Lyman A. Page, Jonathan Sievers, David N. Spergel, Suzanne T. Staggs, Robert J. Thornton, Jeff Van Lanen, Eve Vavagiakis, Edward J. Wollack

Research output: Contribution to journalArticlepeer-review

92 Scopus citations


We report a measurement of the power spectrum of cosmic microwave background (CMB) lensing from two seasons of Atacama Cosmology Telescope polarimeter (ACTPol) CMB data. The CMB lensing power spectrum is extracted from both temperature and polarization data using quadratic estimators. We obtain results that are consistent with the expectation from the best-fit Planck ΛCDM model over a range of multipoles L=80-2100, with an amplitude of lensing Alens=1.06±0.15(stat)±0.06(sys) relative to Planck. Our measurement of the CMB lensing power spectrum gives σ8Ωm0.25=0.643±0.054; including baryon acoustic oscillation scale data, we constrain the amplitude of density fluctuations to be σ8=0.831±0.053. We also update constraints on the neutrino mass sum. We verify our lensing measurement with a number of null tests and systematic checks, finding no evidence of significant systematic errors. This measurement relies on a small fraction of the ACTPol data already taken; more precise lensing results can therefore be expected from the full ACTPol data set.

Original languageEnglish (US)
JournalPhysical Review D
Issue number12
StatePublished - Jun 15 2017

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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