A measurement of the cosmic microwave background B-mode polarization power spectrum at subdegree scales from two years of POLARBEAR data

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Title: A measurement of the cosmic microwave background B-mode polarization power spectrum at subdegree scales from two years of POLARBEAR data
Author(s): Ade, PAR
Aguilar, M
Akiba, Y
Arnold, K
Baccigalupi, C
Barron, D
Beck, D
Bianchini, F
Boettger, D
Borrill, J
Chapman, S
Chinone, Y
Crowley, K
Cukierman, A
Dunner, R
Dobbs, M
Ducout, A
Elleflot, T
Errard, J
Fabbian, G
Feeney, SM
Feng, C
Fujino, T
Galitzki, N
Gilbert, A
Goeckner-Wald, N
Groh, JC
Hall, G
Halverson, N
Hamada, T
Hasegawa, M
Hazumi, M
Hill, CA
Howe, L
Inoue, Y
Jaehnig, G
Jaffe, AH
Jeong, O
Kaneko, D
Katayama, N
Keating, B
Keskitalo, R
Kisner, T
Krachmalnicoff, N
Kusaka, A
Le Jeune, M
Lee, AT
Leitch, EM
Leon, D
Linder, E
Lowry, L
Matsuda, F
Matsumura, T
Minami, Y
Montgomery, J
Navaroli, M
Nishino, H
Paar, H
Peloton, J
Pham, ATP
Poletti, D
Puglisi, G
Reichardt, CL
Richards, PL
Ross, C
Segawa, Y
Sherwin, BD
Silva-Feaver, M
Siritanasak, P
Stebor, N
Stompor, R
Suzuki, A
Tajima, O
Takakura, S
Takatori, S
Tanabe, D
Teply, GP
Tomaru, T
Tucker, C
Whitehorn, N
Zahn, A
Item Type: Journal Article
Abstract: We report an improved measurement of the cosmic microwave background B-mode polarization power spectrum with the Polarbear experiment at 150 GHz. By adding new data collected during the second season of observations (2013–2014) to re-analyzed data from the first season (2012–2013), we have reduced twofold the band-power uncertainties. The band powers are reported over angular multipoles $500\leqslant {\ell }\leqslant 2100$, where the dominant B-mode signal is expected to be due to the gravitational lensing of E-modes. We reject the null hypothesis of no B-mode polarization at a confidence of 3.1σ including both statistical and systematic uncertainties. We test the consistency of the measured B-modes with the Λ Cold Dark Matter (ΛCDM) framework by fitting for a single lensing amplitude parameter A L relative to the Planck 2015 best-fit model prediction. We obtain ${A}_{L}={0.60}_{-0.24}^{+0.26}(\mathrm{stat}{)}_{-0.04}^{+0.00}(\mathrm{inst})$ ± 0.14(foreground) ± 0.04(multi), where ${A}_{L}=1$ is the fiducial ΛCDM value.
Publication Date: 20-Oct-2017
Date of Acceptance: 20-Sep-2017
URI: http://hdl.handle.net/10044/1/60515
DOI: https://dx.doi.org/10.3847/1538-4357/aa8e9f
ISSN: 0004-637X
Publisher: American Astronomical Society
Journal / Book Title: Astrophysical Journal
Volume: 848
Issue: 2
Copyright Statement: © 2017. The American Astronomical Society. All rights reserved.
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
cosmic background radiation
cosmology: observations
large-scale structure of universe
astro-ph.CO
astro-ph.CO
Science & Technology
Physical Sciences
Astronomy & Astrophysics
cosmic background radiation
cosmology: observations
large-scale structure of universe
0201 Astronomical And Space Sciences
0305 Organic Chemistry
0306 Physical Chemistry (Incl. Structural)
Astronomy & Astrophysics
Publication Status: Published
Article Number: 121
Online Publication Date: 2017-10-23
Appears in Collections:Astrophysics
Faculty of Natural Sciences



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