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@article{Nagy:2017:1538-4357/aa7cfd,
author = {Nagy, JM and Ade, PAR and Amiri, M and Benton, SJ and Bergman, AS and Bihary, R and Bock, JJ and Bond, JR and Bryan, SA and Chiang, HC and Contaldi, CR and Dore, O and Duivenvoorden, AJ and Eriksen, HK and Farhang, M and Filippini, JP and Fissel, LM and Fraisse, AA and Freese, K and Galloway, M and Gambrel, AE and Gandilo, NN and Ganga, K and Gudmundsson, JE and Halpern, M and Hartley, J and Hasselfield, M and Hilton, G and Holmes, W and Hristov, VV and Huang, Z and Irwin, KD and Jones, WC and Kuo, CL and Kermish, ZD and Li, S and Mason, PV and Megerian, K and Moncelsi, L and Morford, TA and Netterfield, CB and Nolta, M and Padilla, IL and Racine, B and Rahlin, AS and Reintsema, C and Ruhl, JE and Runyan, MC and Ruud, TM and Shariff, JA and Soler, JD and Song, X and Trangsrud, A and Tucker, C and Tucker, RS and Turner, AD and Van, Der List JF and Weber, AC and Wehus, IK and Wiebe, DV and Young, EY},
doi = {1538-4357/aa7cfd},
journal = {Astrophysical Journal},
title = {A New Limit on CMB Circular Polarization from SPIDER},
url = {http://dx.doi.org/10.3847/1538-4357/aa7cfd},
volume = {844},
year = {2017}
}

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TY  - JOUR
AB  - 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.
AU  - Nagy,JM
AU  - Ade,PAR
AU  - Amiri,M
AU  - Benton,SJ
AU  - Bergman,AS
AU  - Bihary,R
AU  - Bock,JJ
AU  - Bond,JR
AU  - Bryan,SA
AU  - Chiang,HC
AU  - Contaldi,CR
AU  - Dore,O
AU  - Duivenvoorden,AJ
AU  - Eriksen,HK
AU  - Farhang,M
AU  - Filippini,JP
AU  - Fissel,LM
AU  - Fraisse,AA
AU  - Freese,K
AU  - Galloway,M
AU  - Gambrel,AE
AU  - Gandilo,NN
AU  - Ganga,K
AU  - Gudmundsson,JE
AU  - Halpern,M
AU  - Hartley,J
AU  - Hasselfield,M
AU  - Hilton,G
AU  - Holmes,W
AU  - Hristov,VV
AU  - Huang,Z
AU  - Irwin,KD
AU  - Jones,WC
AU  - Kuo,CL
AU  - Kermish,ZD
AU  - Li,S
AU  - Mason,PV
AU  - Megerian,K
AU  - Moncelsi,L
AU  - Morford,TA
AU  - Netterfield,CB
AU  - Nolta,M
AU  - Padilla,IL
AU  - Racine,B
AU  - Rahlin,AS
AU  - Reintsema,C
AU  - Ruhl,JE
AU  - Runyan,MC
AU  - Ruud,TM
AU  - Shariff,JA
AU  - Soler,JD
AU  - Song,X
AU  - Trangsrud,A
AU  - Tucker,C
AU  - Tucker,RS
AU  - Turner,AD
AU  - Van,Der List JF
AU  - Weber,AC
AU  - Wehus,IK
AU  - Wiebe,DV
AU  - Young,EY
DO  - 1538-4357/aa7cfd
PY  - 2017///
SN  - 0004-637X
TI  - A New Limit on CMB Circular Polarization from SPIDER
T2  - Astrophysical Journal
UR  - http://dx.doi.org/10.3847/1538-4357/aa7cfd
UR  - http://hdl.handle.net/10044/1/52031
VL  - 844
ER  -

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Carlo R. Contaldi

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