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A measurement of the cosmic microwave background b-mode polarization power spectrum at sub-degree scales with POLARBEAR

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Title: A measurement of the cosmic microwave background b-mode polarization power spectrum at sub-degree scales with POLARBEAR
Author(s): Ade, PAR
Akiba, Y
Anthony, AE
Arnold, K
Atlas, M
Barron, D
Boettger, D
Borrill, J
Chapman, S
Chinone, Y
Dobbs, M
Elleflot, T
Errard, J
Fabbian, G
Feng, C
Flanigan, D
Gilbert, A
Grainger, W
Halverson, NW
Hasegawa, M
Hattori, K
Hazumi, M
Holzapfel, WL
Hori, Y
Howard, J
Hyland, P
Inoue, Y
Jaehnig, GC
Jaffe, AH
Keating, B
Kermish, Z
Keskitalo, R
Kisner, T
Le Jeune, M
Lee, AT
Leitch, EM
Linder, E
Lungu, M
Matsuda, F
Matsumura, T
Meng, X
Miller, NJ
Morii, H
Moyerman, S
Myers, MJ
Navaroli, M
Nishino, H
Orlando, A
Paar, H
Peloton, J
Poletti, D
Quealy, E
Rebeiz, G
Reichardt, CL
Richards, PL
Ross, C
Schanning, I
Schenck, DE
Sherwin, BD
Shimizu, A
Shimmin, C
Shimon, M
Siritanasak, P
Smecher, G
Spieler, H
Stebor, N
Steinbach, B
Stompor, R
Suzuki, A
Takakura, S
Tomaru, T
Wilson, B
Yadav, A
Zahn, O
Item Type: Journal Article
Abstract: We report a measurement of the B-mode polarization power spectrum in the cosmic microwave background (CMB) using the POLARBEAR experiment in Chile. The faint B-mode polarization signature carries information about the universe's entire history of gravitational structure formation, and the cosmic inflation that may have occurred in the very early universe. Our measurement covers the angular multipole range 500 < ℓ < 2100 and is based on observations of an effective sky area of 25 $\deg ^2$ with 3farcm5 resolution at 150 GHz. On these angular scales, gravitational lensing of the CMB by intervening structure in the universe is expected to be the dominant source of B-mode polarization. Including both systematic and statistical uncertainties, the hypothesis of no B-mode polarization power from gravitational lensing is rejected at 97.2% confidence. The band powers are consistent with the standard cosmological model. Fitting a single lensing amplitude parameter ABB to the measured band powers, $A_{BB} = 1.12 \pm 0.61 ({\rm stat}) ^{+0.04}_{-0.12}({\rm sys}) \pm 0.07 ({\rm multi})$, where ABB = 1 is the fiducial WMAP-9 ΛCDM value. In this expression, "stat" refers to the statistical uncertainty, "sys" to the systematic uncertainty associated with possible biases from the instrument and astrophysical foregrounds, and "multi" to the calibration uncertainties that have a multiplicative effect on the measured amplitude ABB.
Publication Date: 20-Oct-2014
Date of Acceptance: 14-Aug-2014
URI: http://hdl.handle.net/10044/1/60512
DOI: 10.1088/0004-637X/794/2/171
ISSN: 0004-637X
Publisher: American Astronomical Society
Journal / Book Title: Astrophysical Journal
Volume: 794
Issue: 2
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council [2006-2012]
Funder's Grant Number: ST/K001051/1
ST/K001051/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
cosmic background radiation
cosmology: observations
large-scale structure of universe
PROBE WMAP OBSERVATIONS
ANGULAR SCALE
GRAVITY-WAVES
UPPER LIMIT
20 GHZ
CMB
EMISSION
MAPS
SUBMILLIMETER
CALIBRATION
astro-ph.CO
astro-ph.CO
astro-ph.IM
Science & Technology
Physical Sciences
Astronomy & Astrophysics
cosmic background radiation
cosmology: observations
large-scale structure of universe
PROBE WMAP OBSERVATIONS
ANGULAR SCALE
GRAVITY-WAVES
UPPER LIMIT
20 GHZ
CMB
EMISSION
MAPS
SUBMILLIMETER
CALIBRATION
0201 Astronomical And Space Sciences
0305 Organic Chemistry
0306 Physical Chemistry (Incl. Structural)
Astronomy & Astrophysics
Publication Status: Published
Article Number: 171
Online Publication Date: 2014-10-07
Appears in Collections:Physics
Astrophysics
Faculty of Natural Sciences



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