• DOI:10.1103/PhysRevLett.79.2394
• Corpus ID: 13943605

Is there evidence for cosmic anisotropy in the polarization of distant radio sources

@article{Carroll1997IsTE,
  title={Is there evidence for cosmic anisotropy in the polarization of distant radio sources},
  author={S. Carroll and George B. Field},
  journal={Physical Review Letters},
  year={1997},
  volume={79},
  pages={2394-2397}
}

• S. Carroll, G. Field
• Published 27 April 1997
• Physics
• Physical Review Letters

Measurements of the polarization angle and orientation of cosmological radio sources may be used to search for unusual effects in the propagation of light through the Universe. Recently, Nodland and Ralston [Phys.Rev.Lett.{bold 78}, 3043 (1997)] have claimed to find evidence for a redshift- and direction-dependent rotation effect in existing data. We reexamine these data and argue that there is no statistically significant signal present. We are able to place stringent limits on hypothetical chiral interactions of photons propagating through spacetime. {copyright} {ital 1997} {ital The American Physical Society}