Did LIGO Detect Dark Matter?

@article{Bird2016DidLD,
  title={Did LIGO Detect Dark Matter?},
  author={S. Bird and I. Cholis and Julian B. Mu{\~n}oz and Yacine Ali-Ha{\"i}moud and M. Kamionkowski and E. Kovetz and A. Raccanelli and A. Riess},
  journal={Physical review letters},
  year={2016},
  volume={116 20},
  pages={
          201301
        }
}
We consider the possibility that the black-hole (BH) binary detected by LIGO may be a signature of dark matter. Interestingly enough, there remains a window for masses 20M_{⊙}≲M_{bh}≲100M_{⊙} where primordial black holes (PBHs) may constitute the dark matter. If two BHs in a galactic halo pass sufficiently close, they radiate enough energy in gravitational waves to become gravitationally bound. The bound BHs will rapidly spiral inward due to the emission of gravitational radiation and… Expand
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