Observational Evidence Against Birefringence Over Cosmological Distances
J. F. C. Wardle, R. A. Perley, M. H. Cohen
Abstract
We show that recent radio and optical observations of polarized radiation from well-resolved high redshift quasars and radio galaxies rule out the cosmological rotation of the plane of polarization claimed recently by Nodland and Ralston. A least squares fit to the radio data has a slope only 2% of their claimed effect.
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