Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment.,Physical Review Letters

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Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-04-03 , DOI: 10.1103/physrevlett.124.131301
S Adachi ₁ , M A O Aguilar Faúndez _{2,

3} , Y Akiba ₄ , A Ali ₅ , K Arnold ₆ , C Baccigalupi _{7,

8,

9} , D Barron ₁₀ , D Beck ₁₁ , F Bianchini ₁₂ , J Borrill _{13,

14} , J Carron ₁₅ , K Cheung ₅ , Y Chinone _{5,

16,

17} , K Crowley ₅ , H El Bouhargani ₁₁ , T Elleflot ₆ , J Errard ₁₁ , G Fabbian ₁₅ , C Feng ₁₈ , T Fujino ₁₉ , N Goeckner-Wald ₅ , M Hasegawa ₂₀ , M Hazumi _{4,

16,

20,

21} , C A Hill ₅ , L Howe ₆ , N Katayama ₁₆ , B Keating ₆ , S Kikuchi ₁₉ , A Kusaka _{17,

22,

23,

24} , A T Lee _{5,

22,

25} , D Leon ₆ , E Linder ₁₄ , L N Lowry ₆ , F Matsuda ₁₆ , T Matsumura ₁₆ , Y Minami ₂₀ , T Namikawa ₂₆ , M Navaroli ₆ , H Nishino ₂₄ , J Peloton ₂₇ , A T P Pham ₁₂ , D Poletti _{7,

8,

9} , G Puglisi _{28,

29} , C L Reichardt ₁₂ , Y Segawa ₄ , B D Sherwin ₃₀ , M Silva-Feaver ₆ , P Siritanasak ₆ , R Stompor ₁₁ , O Tajima ₁ , S Takatori _{4,

20} , D Tanabe _{4,

20} , G P Teply ₆ , C Vergès ₁₁ ,

Affiliation

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Departamento de Física, FCFM, Universidad de Chile, Blanco Encalada 2008, Santiago, Chile.
SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa 240-0193, Japan.
Department of Physics, University of California, Berkeley, California 94720, USA.
Department of Physics, University of California, San Diego, California 92093-0424, USA.
International School for Advanced Studies (SISSA), Via Bonomea 265, 34136 Trieste, Italy.
Institute for Fundamental Physics of the Universe (IFPU), Via Beirut 2, 34014 Trieste, Italy.
National Institute for Nuclear Physics (INFN), via Valerio 2, 34127 Trieste, Italy.
Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA.
AstroParticule et Cosmologie (APC), Univ Paris Diderot, CNRS/IN2P3, CEA/Irfu, Obs de Paris, Sorbonne Paris Cité, 75013 Paris, France.
School of Physics, University of Melbourne, Parkville VIC 3010, Australia.
Computational Cosmology Center, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Space Sciences Laboratory, University of California, Berkeley, California 94720, USA.
Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom.
Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan.
Kavli Institute for the Physics and Mathematics of the Universe (WPI), Berkeley Satellite, the University of California, Berkeley, California 94720, USA.
Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801, USA.
Yokohama National University, Yokohama, Kanagawa 240-8501, Japan.
High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Kanagawa 252-0222, Japan.
Physics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan.
Research Center for the Early Universe, School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
Radio Astronomy Laboratory, University of California, Berkeley, California 94720, USA.
DAMTP, University of Cambridge, Cambridge CB3 0WA, United Kingdom.
Laboratoire de l'Accélérateur Linéaire, Université Paris-Sud, CNRS/IN2P3, 91400 Orsay, France.
Department of Physics, Stanford University, Stanford, California 94305, USA.
Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
Kavli Institute for Cosmology Cambridge, Cambridge CB3 OHA, United Kingdom.

Using only cosmic microwave background polarization data from the polarbear experiment, we measure B-mode polarization delensing on subdegree scales at more than 5σ significance. We achieve a 14% B-mode power variance reduction, the highest to date for internal delensing, and improve this result to 22% by applying for the first time an iterative maximum a posteriori delensing method. Our analysis demonstrates the capability of internal delensing as a means of improving constraints on inflationary models, paving the way for the optimal analysis of next-generation primordial B-mode experiments.

中文翻译：

借助POLARBEAR实验，对宇宙微波背景极化B模式进行内部解密。

仅使用来自Polarbear实验的宇宙微波背景极化数据，我们以低于5σ的显着性在亚度尺度上测量了B模式极化脱模。我们实现了14％的B模式功率方差降低，这是迄今为止内部delensing的最高水平，并且通过首次应用迭代最大值后验delensing方法将这一结果提高到22％。我们的分析证明了内部delensing作为改善通货膨胀模型约束的一种手段，为下一代原始B模式实验的最佳分析铺平了道路。

更新日期：2020-04-01

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