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Measurements of B-mode Polarization of the Cosmic Microwave Background from 500 Square Degrees of SPTpol Data | | J.T. Sayre
; C. L. Reichardt
; J. W. Henning
; P. A. R. Ade
; A. J. Anderson
; J. E. Austermann
; J. S. Avva
; J. A. Beall
; A. N. Bender
; B. A. Benson
; F. Bianchini
; L. E. Bleem
; J. E. Carlstrom
; C. L. Chang
; H. C. Chiang
; R. Citron
; C. Corbett Moran
; T. M. Crawford
; A. T. Crites
; T. de Haan
; M. A. Dobbs
; W. Everett
; J. Gallicchio
; E. M. George
; A. Gilbert
; N. Gupta
; N. W. Halverson
; N. Harrington
; G. C. Hilton
; G. P. Holder
; W. L. Holzapfel
; J. D. Hrubes
; N. Huang
; J. Hubmayr
; K. D. Irwin
; L. Knox
; A. T. Lee
; D. Li
; A. Lowitz
; J. J. McMahon
; S. S. Meyer
; L. M. Mocanu
; J. Montgomery
; A. Nadolski
; T. Natoli
; J. P. Nibarger
; G. Noble
; V. Novosad
; S. Padin
; S. Patil
; C. Pryke
; J. E. Ruhl
; B. R. Saliwanchik
; K. K. Schaffer
; C. Sievers
; G. Smecher
; A. A. Stark
; C. Tucker
; K. Vanderlinde
; T. Veach
; J. D. Vieira
; G. Wang
; N. Whitehorn
; W. L. K. Wu
; V. Yefremenko
; | | Date: |
13 Oct 2019 | | Abstract: | We report a B-mode power spectrum measurement from the cosmic microwave
background (CMB) polarization anisotropy observations made using the SPTpol
instrument on the South Pole Telescope. This work uses 500 deg$^2$ of SPTpol
data, a five-fold increase over the last SPTpol B-mode release. As a result,
the bandpower uncertainties have been reduced by more than a factor of two, and
the measurement extends to lower multipoles: $52 < ell < 2301$. Data from both
95 and 150 GHz are used, allowing for three cross-spectra: 95 GHz x 95 GHz, 95
GHz x 150 GHz, and 150 GHz x 150 GHz. B-mode power is detected at very high
significance; we find $P(BB < 0) = 5.8 imes 10^{-71}$, corresponding to a
$18.1 sigma$ detection of power. An upper limit is set on the tensor-to-scalar
ratio, $r < 0.44$ at 95% confidence (the expected $1 sigma$ constraint on $r$
given the measurement uncertainties is 0.22). We find the measured B-mode power
is consistent with the Planck best-fit $Lambda$CDM model predictions. Scaling
the predicted lensing B-mode power in this model by a factor Alens, the data
prefer Alens = $1.17 pm 0.13$. These data are currently the most precise
measurements of B-mode power at $ell > 320$. | | Source: | arXiv, 1910.5748 | | Services: | Forum | Review | PDF | Favorites | |
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