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2 results on '"Lowry, LN"'

1. A measurement of the CMB E-mode angular power spectrum at subdegree scales from 670 square degrees of POLARBEAR data

Author

Adachi, S, Faúndez, MAOA, Arnold, K, Baccigalupi, C, Barron, D, Beck, D, Bianchini, F, Chapman, S, Cheung, K, Chinone, Y, Crowley, K, Dobbs, M, Bouhargani, HE, Elleflot, T, Errard, J, Fabbian, G, Feng, C, Fujino, T, Galitzki, N, Goeckner-Wald, N, Groh, J, Hall, G, Hasegawa, M, Hazumi, M, Hirose, H, Jaffe, AH, Jeong, O, Kaneko, D, Katayama, N, Keating, B, Kikuchi, S, Kisner, T, Kusaka, A, Lee, AT, Leon, D, Linder, E, Lowry, LN, Matsuda, F, Matsumura, T, Minami, Y, Navaroli, M, Nishino, H, Pham, ATP, Poletti, D, Reichardt, CL, Segawa, Y, Siritanasak, P, Tajima, O, Takakura, S, Takatori, S, Tanabe, D, Teply, GP, Tsai, C, Vergès, C, Westbrook, B, and Zhou, Y

Subjects
astro-ph.CO, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

We report a measurement of the E-mode polarization power spectrum of the cosmic microwave background (CMB) using 150 GHz data taken from July 2014 to December 2016 with the POLARBEAR experiment. We reach an effective polarization map noise level of $32\,\mu\mathrm{K}$-$\mathrm{arcmin}$ across an observation area of 670 square degrees. We measure the EE power spectrum over the angular multipole range $500 \leq \ell

Published
2020

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

Author

Adachi, S, Aguilar Faúndez, MAO, 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, 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, and POLARBEAR Collaboration

Subjects
General Physics, Engineering, gr-qc, Physical Sciences, astro-ph.CO, POLARBEAR Collaboration, Mathematical Sciences, astro-ph.IM
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 aposteriori 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.

Published
2020

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