Astrophysical Implications of GW190412 as a Remnant of a Previous Black-Hole Merger.

  title={Astrophysical Implications of GW190412 as a Remnant of a Previous Black-Hole Merger.},
  author={Davide Gerosa and Salvatore Vitale and Emanuele Berti},
  journal={Physical review letters},
  volume={125 10},
Two of the dominant channels to produce merging stellar-mass black-hole binaries are believed to be the isolated evolution of binary stars in the field and dynamical formation in star clusters. The first reported black-hole binary event from the third LIGO/Virgo observing run (GW190412) is unusual in that it has unequal masses, nonzero effective spin, and nonzero primary spin at 90% confidence interval. We show that this event should be exceedingly rare in the context of both the field and… Expand

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