Photon-Axion mixing in an inhomogeneous universe

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  • 24 July 2002
Abstract
We consider the dimming of photons from high redshift type 1a supernovae by mixing with a pseudoscalar axion field in the intergalactic medium. We model the electron density using a lognormal probability distribution and assume frozen in magnetic fields. We are unable to obtain sufficient dimming in order to explain the apparent acceleration without violating the bounds on the frequency dependence of the dimming. We also show that any axion mixing leading to a reduction in optical luminosities would significantly reduce the polarisation of UV light from intermediate redshift objects.

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