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}
}
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… 

Figures from this paper

New Phenomena in Propagation of Radio Polarizations due to Magnetic Fields on Cosmological Scales
We discuss a new mechanism which could cause a rotation of polarization of electromagnetic waves due to magnetic fields on cosmological scales. The effect hinges on the geometrical phase of
ANISOTROPY IN THE PROPAGATION OF RADIO POLARIZATIONS FROM COSMOLOGICALLY DISTANT GALAXIES
Radiation traversing the observable universe provides powerful ways to probe anisotropy of electromagnetic propagation. A controversial recent study claimed a signal of dipole character. Here we test
LIMITS ON COSMOLOGICAL BIREFRINGENCE FROM THE ULTRAVIOLET POLARIZATION OF DISTANT RADIO GALAXIES
We report on an update of the test on the rotation of the plane of linear polarization for light traveling over cosmological distances, using a comparison between the measured direction of the UV
Cosmic Polarization Rotation in view of the recent CMB experiments
The possibility that there is some Cosmic Polarization Rotation (CPR), i.e. that the polarization angle rotates while a photon travels in vacuum over large distances, is important for at least two
Cosmic optical activity in the spacetime of a scalar-tensor screwed cosmic string
Measurements of radio emission from distant galaxies and quasars verify that the polarization vectors of these radiations are not randomly oriented as naturally expected. This peculiar phenomenon
Cosmological Birefringence: An Astrophysical Test of Fundamental Physics
We review the methods used to test for the existence of cosmological birefringence, i.e. a rotation of the plane of linear polarization for electromagnetic radiation traveling over cosmological
PVLAS experiment: some astrophysical consequences
The birefringent effects of photon-pseudo-scalar boson (Goldstone) particle mixing in intergalactic magnetic field are calculated for cosmological objects. We use the recent results of PVLAS
The polarization in the JVAS/CLASS flat-spectrum radio sources: II. A search for aligned radio polarizations
We have used the very large JVAS/CLASS 8.4-GHz surveys of flat-spectrum radio sources to test the hypothesis that there is a systematic alignment of polarization position angle vectors on
Covariant Symmetry Classifications for Observables of Cosmological Birefringence
Polarizations of electromagnetic waves from distant galaxies are known to be correlated with the source orientations. These quantities have been used to search for signals of cosmological
Precision tests of parity violation over cosmological distances
Recent measurements of the Cosmic Microwave Background $B$-mode polarization power spectrum by the BICEP2 and POLARBEAR experiments have demonstrated new precision tools for probing fundamental
...
...

References

SHOWING 1-10 OF 31 REFERENCES
Phys
  • Rev. Lett. 78, 3043
  • 1997
Phys. Rev. Lett
  • Phys. Rev. Lett
  • 1997
Phys
  • Rev. D 41, 1231
  • 1990
Phys. Rev. D
  • Phys. Rev. D
  • 1990
Pub
  • Astron. Soc. Pacific, 97, 932
  • 1985
Phys
  • Lett. B289, 67
  • 1992
Nucl
  • Phys. B479, 173
  • 1996
Phys. Rev. D
  • Phys. Rev. D
  • 1995
Mon. Not. R. Astr. Soc
  • Mon. Not. R. Astr. Soc
  • 1980
Phys
  • Lett. A132, 151
  • 1988
...
...