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arxiv 1411.6287 v2 pith:6ZE34ARJ submitted 2014-11-23 astro-ph.CO

Cosmological birefringence constraints from CMB and astrophysical polarization data

classification astro-ph.CO
keywords cosmologicalastrophysicalbirefringencedatadistanceenergyphotonspolarization
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Cosmological birefringence is a rotation of the polarization plane of photons coming from sources of astrophysical and cosmological origin. The rotation can also depend on the energy of the photons and not only on the distance of the source and on the cosmological evolution of the underlying theoretical model. In this work, we constrain few selected models for cosmological birefringence, combining CMB and astrophysical data at radio, optical, X and gamma wavelengths, taking into account the specific energy and distance dependences.

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