학술논문
Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment
Document Type
article
Author
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
Source
Physical Review Letters. 124(13)
Subject
Language
Abstract
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.