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Special Issue — Spacetime Structure and Electrodynamics; Editor: Wei-Tou Ni; Co-Editors: Sperello di Serego Alighieri, Jonathan Kaufman and Brian KeatingNo Access

Imaging cosmic polarization rotation

    We introduce a method to isolate the contribution of parity-violating modes to the peak constrained correlation function. This method can be used as a local estimate of polarization rotation. We test this method using simulations and by applying it to Planck maps [P. A. R. Ade et al., arXiv:1502.01589]. We obtain a constraint on the monopole of the polarization rotation angle α=0.31±0.23.

    PACS: 98.80.−k, 98.80.Es


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