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25 April 2024

» arxiv » 1611.9753

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The Atacama Cosmology Telescope: Two-Season ACTPol Lensing Power Spectrum
Blake D. Sherwin ; Alexander van Engelen ; Neelima Sehgal ; Mathew Madhavacheril ; Graeme E. Addison ; Simone Aiola ; Rupert Allison ; Nicholas Battaglia ; James A. Beall ; Daniel T. Becker ; J. Richard Bond ; Erminia Calabrese ; Rahul Datta ; Mark J. Devlin ; Rolando Dunner ; Joanna Dunkley ; Anna E. Fox ; Patricio Gallardo ; Mark Halpern ; Matthew Hasselfield ; Shawn Henderson ; J. Colin Hill ; Gene C. Hilton ; Johannes Hubmayr ; John P. Hughes ; Adam D. Hincks ; Renee Hlozek ; Kevin M. Huffenberger ; Brian Koopman ; Arthur Kosowsky ; Thibaut Louis ; Loic 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 ;
Date:	29 Nov 2016
Abstract:	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 LCDM model over a range of multipoles L=80-2100, with an amplitude of lensing A_lens = 1.06 +/- 0.15 (stat.) +/- 0.06 (sys.) relative to Planck. Our measurement of the CMB lensing power spectrum gives sigma_8 Omega_m^0.25 = 0.643 +/- 0.054; including baryon acoustic oscillation scale data, we constrain the amplitude of density fluctuations to be sigma_8 = 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 dataset.
Source:	arXiv, 1611.9753
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