Effects of the intergalactic plasma on supernova dimming via photon–axion oscillations

@inproceedings{Cski2002EffectsOT,
  title={Effects of the intergalactic plasma on supernova dimming via photon–axion oscillations},
  author={Csaba Cs{\'a}ki and Nemanja Kaloper and John Terning},
  year={2002}
}
We have recently proposed a mechanism of photon–axion oscillations as a way of rendering supernovae dimmer without cosmic acceleration. Subsequently, it has been argued that the intergalactic plasma may interfere adversely with this mechanism by rendering the oscillations energy dependent. Here we show that this energy dependence is extremely sensitive to the precise value of the free electron density in the Universe. Decreasing the electron density by only a factor of 4 is already sufficient… CONTINUE READING

Figures from this paper.