Confusing Head-On Collisions with Precessing Intermediate-Mass Binary Black Hole Mergers.

  title={Confusing Head-On Collisions with Precessing Intermediate-Mass Binary Black Hole Mergers.},
  author={Juan Calder{\'o}n Bustillo and Nicolas Sanchis-Gual and Alejandro Torres-Forn{\'e} and Jos{\'e} A. Font},
  journal={Physical review letters},
  volume={126 20},
We report a degeneracy between the gravitational-wave signals from quasicircular precessing black-hole mergers and those from extremely eccentric mergers, namely, head-on collisions. Performing model selection on numerically simulated signals of head-on collisions using models for quasicircular binaries, we find that, for signal-to-noise ratios of 15 and 25, typical of Advanced LIGO observations, head-on mergers with respective total masses of M∈(125,300)M_{⊙} and M∈(200,440)M_{⊙} would be… 

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