Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum from Two Years of POLARBEAR Data
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Date
2020-04-17Source Title
The Astrophysical Journal: an international review of astronomy and astronomical physicsPublisher
American Astronomical SocietyAffiliation
School of PhysicsMetadata
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Journal ArticleCitations
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 locationOpen Access URL
https://arxiv.org/pdf/1911.10980ARC Grant code
ARC/FT150100074Abstract
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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