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|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 < l < 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 l (l + 1)C-l(VV) /(2 pi) ranging from 141 to 255 mu K-2 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.|
|Electronic Publication Date:||1-Aug-2017|
|Citation:||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. (2017). A New Limit on CMB Circular Polarization from SPIDER. ASTROPHYSICAL JOURNAL, 844 (2), 10.3847/1538-4357/aa7cfd|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||ASTROPHYSICAL JOURNAL|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
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