A New Limit on CMB Circular Polarization from SPIDER

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Title: A New Limit on CMB Circular Polarization from SPIDER
Authors: Nagy, JM
Ade, PAR
Amiri, M
Benton, SJ
Bergman, AS
Bihary, R
Bock, JJ
Bond, JR
Bryan, SA
Chiang, HC
Contaldi, CR
Dore, O
Duivenvoorden, AJ
Eriksen, HK
Farhang, M
Filippini, JP
Fissel, LM
Fraisse, AA
Freese, K
Galloway, M
Gambrel, AE
Gandilo, NN
Ganga, K
Gudmundsson, JE
Halpern, M
Hartley, J
Hasselfield, M
Hilton, G
Holmes, W
Hristov, VV
Huang, Z
Irwin, KD
Jones, WC
Kuo, CL
Kermish, ZD
Li, S
Mason, PV
Megerian, K
Moncelsi, L
Morford, TA
Netterfield, CB
Nolta, M
Padilla, IL
Racine, B
Rahlin, AS
Reintsema, C
Ruhl, JE
Runyan, MC
Ruud, TM
Shariff, JA
Soler, JD
Song, X
Trangsrud, A
Tucker, C
Tucker, RS
Turner, AD
Van Der List, JF
Weber, AC
Wehus, IK
Wiebe, DV
Young, EY
Item Type: Journal Article
Abstract: We present a new upper limit on cosmic microwave background (CMB) circular polarization from the 2015 flight of Spider, a balloon-borne telescope designed to search for B-mode linear polarization from cosmic inflation. Although the level of circular polarization in the CMB is predicted to be very small, experimental limits provide a valuable test of the underlying models. By exploiting the nonzero circular-to-linear polarization coupling of the half-wave plate polarization modulators, data from Spider's 2015 Antarctic flight provide a constraint on Stokes V at 95 and 150 GHz in the range $33\lt {\ell }\lt 307$. No other limits exist over this full range of angular scales, and Spider improves on the previous limit by several orders of magnitude, providing 95% C.L. constraints on ${\ell }({\ell }+1){C}_{{\ell }}^{{VV}}/(2\pi )$ ranging from 141 to 255 μK2 at 150 GHz for a thermal CMB spectrum. As linear CMB polarization experiments become increasingly sensitive, the techniques described in this paper can be applied to obtain even stronger constraints on circular polarization.
Issue Date: 2-Aug-2017
Date of Acceptance: 28-Jun-2017
ISSN: 0004-637X
Publisher: American Astronomical Society
Journal / Book Title: Astrophysical Journal
Volume: 844
Issue: 2
Copyright Statement: © 2017. The American Astronomical Society. All rights reserved.
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/J000353/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
cosmic background radiation
0201 Astronomical And Space Sciences
0305 Organic Chemistry
0306 Physical Chemistry (Incl. Structural)
Publication Status: Published
Article Number: 151
Appears in Collections:Physics
Theoretical Physics
Faculty of Natural Sciences

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