Details

Autor(en) / Beteiligte

• Nagy, J. M.
• Ade, P. A. R.
• Amiri, M.
• Benton, S. J.
• Bergman, A. S.
• Bihary, R.
• Bock, J. J.
• Bond, J. R.
• Bryan, S. A.
• Chiang, H. C.
• Contaldi, C. R.
• Doré, O.
• Duivenvoorden, A. J.
• Eriksen, H. K.
• Farhang, M.
• Filippini, J. P.
• Fissel, L. M.
• Fraisse, A. A.
• Freese, K.
• Galloway, M.
• Gambrel, A. E.
• Gandilo, N. N.
• Ganga, K.
• Gudmundsson, J. E.
• Halpern, M.
• Hartley, J.
• Hasselfield, M.
• Hilton, G.
• Holmes, W.
• Hristov, V. V.
• Huang, Z.
• Irwin, K. D.
• Jones, W. C.
• Kuo, C. L.
• Kermish, Z. D.
• Li, S.
• Mason, P. V.
• Megerian, K.
• Moncelsi, L.
• Morford, T. A.
• Netterfield, C. B.
• Nolta, M.
• Padilla, I. L.
• Racine, B.
• Rahlin, A. S.
• Reintsema, C.
• Ruhl, J. E.
• Runyan, M. C.
• Ruud, T. M.
• Shariff, J. A.
• Soler, J. D.
• Song, X.
• Trangsrud, A.
• Tucker, C.
• Tucker, R. S.
• Turner, A. D.
• List, J. F. Van Der
• Weber, A. C.
• Wehus, I. K.
• Wiebe, D. V.
• Young, E. Y.

Titel

A New Limit on CMB Circular Polarization from SPIDER

Ist Teil von

• The Astrophysical journal, 2017-08, Vol.844 (2), p.151

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2017

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 < < 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 ( + 1 ) C VV ( 2 π ) ranging from 141 to 255 K2 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.