作者
A Manzotti, KT Story, WLK Wu, JE Austermann, JA Beall, AN Bender, BA Benson, LE Bleem, JJ Bock, JE Carlstrom, CL Chang, HC Chiang, HM Cho, R Citron, A Conley, TM Crawford, AT Crites, T De Haan, MA Dobbs, S Dodelson, W Everett, J Gallicchio, EM George, A Gilbert, NW Halverson, N Harrington, JW Henning, GC Hilton, GP Holder, WL Holzapfel, S Hoover, Z Hou, JD Hrubes, N Huang, J Hubmayr, KD Irwin, R Keisler, L Knox, AT Lee, EM Leitch, D Li, JJ McMahon, SS Meyer, LM Mocanu, T Natoli, JP Nibarger, V Novosad, S Padin, C Pryke, CL Reichardt, JE Ruhl, BR Saliwanchik, JT Sayre, KK Schaffer, G Smecher, AA Stark, K Vanderlinde, JD Vieira, MP Viero, G Wang, N Whitehorn, V Yefremenko, M Zemcov
发表日期
2017/8/30
期刊
The Astrophysical Journal
卷号
846
期号
1
页码范围
45
出版商
IOP Publishing
简介
We present a demonstration of delensing the observed cosmic microwave background (CMB) B-mode polarization anisotropy. This process of reducing the gravitational-lensing-generated B-mode component will become increasingly important for improving searches for the B modes produced by primordial gravitational waves. In this work, we delens B-mode maps constructed from multi-frequency SPTpol observations of a 90 deg 2 patch of sky by subtracting a B-mode template constructed from two inputs: SPTpol E-mode maps and a lensing potential map estimated from the Herschel 500 μm map of the cosmic infrared background. We find that our delensing procedure reduces the measured B-mode power spectrum by
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A Manzotti, KT Story, WLK Wu, JE Austermann… - The Astrophysical Journal, 2017