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Indication of Anisotropy in Electromagnetic Propagation over Cosmological Distances

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arxiv astro-ph/9704196 v1 pith:7JD7S4JT submitted 1997-04-20 astro-ph hep-ph

Borge Nodland , John P. Ralston This is my paper · ORCID
classification astro-phhep-ph
keywords cosmologicaldistanceseffectelectromagneticorderrotationsystematicyields
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We report a systematic rotation of the plane of polarization of electromagnetic radiation propagating over cosmological distances. The effect is extracted independently from Faraday rotation, and found to be correlated with the angular positions and distances to the sources. Monte Carlo analysis yields probabilistic P-values of order 10^(-3) for this to occur as a fluctuation. A fit yields a birefringence scale of order 10^(25) meters. Dependence on redshift z rules out a local effect. Barring hidden systematic bias in the data, the correlation indicates a new cosmological effect.

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Cited by 1 Pith paper

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  1. 3-form dark energy and cosmic birefringence

    astro-ph.CO 2026-08 conditional novelty 6.0 of 10

    3-form dark energy can explain cosmic birefringence with a dimension-4 photon coupling, yielding redshift profiles that can mimic or differ from axion dark energy, but the implied photon mass estimate is numerically shaky.

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