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    Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum from Two Years of POLARBEAR Data

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    Author
    Aguilar Faundez, M; Arnold, K; Baccigalupi, C; Barron, D; Beck, D; Beckman, S; Bianchini, F; Carron, J; Cheung, K; Chinone, Y; ...
    Date
    2020-04-17
    Source Title
    The Astrophysical Journal: an international review of astronomy and astronomical physics
    Publisher
    American Astronomical Society
    University of Melbourne Author/s
    Bianchini, Federico; Reichardt, Christian
    Affiliation
    School of Physics
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Aguilar Faundez, M., Arnold, K., Baccigalupi, C., Barron, D., Beck, D., Beckman, S., Bianchini, F., Carron, J., Cheung, K., Chinone, Y., El Bouhargani, H., Elleflot, T., Errard, J., Fabbian, G., Feng, C., Fujino, T., Goeckner-Wald, N., Hamada, T., Hasegawa, M. ,... Tsai, C. (2020). Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum from Two Years of POLARBEAR Data. The Astrophysical Journal, 893 (1), https://doi.org/10.3847/1538-4357/ab7e29.
    Access Status
    This item is embargoed and will be available on 2021-04-17. Access full text via the Open Access location
    URI
    http://hdl.handle.net/11343/251350
    DOI
    10.3847/1538-4357/ab7e29
    Open Access URL
    https://arxiv.org/pdf/1911.10980
    ARC Grant code
    ARC/FT150100074
    Abstract
    We present a measurement of the gravitational lensing deflection power spectrum reconstructed with two seasons of cosmic microwave background polarization data from the POLARBEAR experiment. Observations were taken at 150 GHz from 2012 to 2014 and surveyed three patches of sky totaling 30 square degrees. We test the consistency of the lensing spectrum with a cold dark matter cosmology and reject the no-lensing hypothesis at a confidence of 10.9σ, including statistical and systematic uncertainties. We observe a value of A L = 1.33 ± 0.32 (statistical) ±0.02 (systematic) ±0.07 (foreground) using all polarization lensing estimators, which corresponds to a 24% accurate measurement of the lensing amplitude. Compared to the analysis of the first-year data, we have improved the breadth of both the suite of null tests and the error terms included in the estimation of systematic contamination.

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