Gravitational waves from primordial black hole mergers

@article{Raidal2017GravitationalWF,
  title={Gravitational waves from primordial black hole mergers},
  author={Martti Raidal and Ville Vaskonen and Hardi Veerm{\"a}e},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2017},
  volume={2017},
  pages={037 - 037}
}
We study the production of primordial black hole (PBH) binaries and the resulting merger rate, accounting for an extended PBH mass function and the possibility of a clustered spatial distribution. Under the hypothesis that the gravitational wave events observed by LIGO were caused by PBH mergers, we show that it is possible to satisfy all present constraints on the PBH abundance, and find the viable parameter range for the lognormal PBH mass function. The non-observation of a gravitational wave… 
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