Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment

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    Author
    Adachi, S; Aguilar Faundez, MAO; Akiba, Y; Ali, A; Arnold, K; Baccigalupi, C; Barron, D; Beck, D; Bianchini, F; Borrill, J; ...
    Date
    2020-04-01
    Source Title
    Physical Review Letters
    Publisher
    AMER PHYSICAL SOC
    University of Melbourne Author/s
    Bianchini, Federico; Reichardt, Christian
    Affiliation
    School of Physics
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    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. ,... Verges, C. (2020). Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment. PHYSICAL REVIEW LETTERS, 124 (13), https://doi.org/10.1103/PhysRevLett.124.131301.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/251349
    DOI
    10.1103/PhysRevLett.124.131301
    Open Access URL
    https://arxiv.org/pdf/1909.13832
    ARC Grant code
    ARC/FT150100074
    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.

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