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Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment
- Adachi, S;
- Faúndez, MAO Aguilar;
- Akiba, Y;
- Ali, A;
- Arnold, K;
- Baccigalupi, C;
- Barron, D;
- Beck, D;
- Bianchini, F;
- Borrill, J;
- Carron, J;
- Cheung, K;
- Chinone, Y;
- Crowley, K;
- Bouhargani, H El;
- Elleflot, T;
- Errard, J;
- Fabbian, G;
- Feng, C;
- Fujino, T;
- Goeckner-Wald, N;
- Hasegawa, M;
- Hazumi, M;
- Hill, CA;
- Howe, L;
- Katayama, N;
- Keating, B;
- Kikuchi, S;
- Kusaka, A;
- Lee, AT;
- Leon, D;
- Linder, E;
- Lowry, LN;
- Matsuda, F;
- Matsumura, T;
- Minami, Y;
- Namikawa, T;
- Navaroli, M;
- Nishino, H;
- Peloton, J;
- Pham, ATP;
- Poletti, D;
- Puglisi, G;
- Reichardt, CL;
- Segawa, Y;
- Sherwin, BD;
- Silva-Feaver, M;
- Siritanasak, P;
- Stompor, R;
- Tajima, O;
- Takatori, S;
- Tanabe, D;
- Teply, GP;
- Vergès, C
Published Web Location
https://doi.org/10.1103/physrevlett.124.131301Abstract
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.
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