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.
Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment / Adachi, S., Aguilar Faundez, M.A.O., Akiba, Y., Ali, A., Arnold, K., Baccigalupi, C., Barron, D., Beck, D., Bianchini, F., Borrill, J., Carron, J., Cheung, K., Chinone, Y., Crowley, K., El Bouhargani, H., Elleflot, T., Errard, J., Fabbian, G., Feng, C., Fujino, T., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 124:13(2020), pp. 131301-1-131301-7. [10.1103/PhysRevLett.124.131301]
Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment
Arnold K.;Baccigalupi C.;Bianchini F.;Borrill J.;Fabbian G.;Keating B.;Poletti D.;Puglisi G.;Silva-Feaver M.;Stompor R.;
2020-01-01
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.| File | Dimensione | Formato | |
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