Voids as alternatives to dark energy and the propagation of γ rays through the universe.

@article{DeLavallaz2012VoidsAA,
  title={Voids as alternatives to dark energy and the propagation of γ rays through the universe.},
  author={Arnaud DeLavallaz and Malcolm Fairbairn},
  journal={Physical review letters},
  year={2012},
  volume={108 17},
  pages={
          171301
        }
}
  • Arnaud DeLavallaz, Malcolm Fairbairn
  • Published in Physical review letters 2012
  • Physics, Medicine
  • We test the opacity of a void universe to TeV energy γ rays having obtained the extragalactic background light in that universe using a simple model and the observed constraints on the star formation rate history. We find that the void universe has significantly more opacity than a Λ cold dark matter universe, putting it at odds with observations of BL-Lac objects. We argue that while this method of distinguishing between the two cosmologies contains uncertainties, it circumvents any debates… CONTINUE READING

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