Fitting BICEP2 with defects, primordial gravitational waves and dust

  title={Fitting BICEP2 with defects, primordial gravitational waves and dust},
  author={Joanes Lizarraga and Jon Urrestilla and David Daverio and Mark Hindmarsh and Martin Kunz and Andrew R. Liddle},
  journal={Journal of Physics: Conference Series},
In this work we discuss the possibility of cosmic defects being responsible for the B-mode signal measured by the BICEP2 collaboration. We also allow for the presence of other cosmological sources of B-modes such as inflationary gravitational waves and polarized dust foregrounds, which might contribute to or dominate the signal. On the one hand, we find that defects alone give a poor fit to the data points. On the other, we find that defects help to improve the fit at higher multipoleswhen they… 



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