GW190412 as a Third-generation Black Hole Merger from a Super Star Cluster

  title={GW190412 as a Third-generation Black Hole Merger from a Super Star Cluster},
  author={Carl L. Rodriguez and Kyle Kremer and Michael Y. Grudi'c and Zachary Hafen and Sourav Chatterjee and Giacomo Fragione and Astrid Lamberts and Miguel A. S. Martinez and Frederic A. Rasio and Newlin C. Weatherford and Claire S. Ye},
  journal={The Astrophysical Journal Letters},
We explore the possibility that GW190412, a binary black hole merger with a non-equal-mass ratio and significantly spinning primary, was formed through repeated black hole mergers in a dense super star cluster. Using a combination of semianalytic prescriptions for the remnant spin and recoil kick of black hole mergers, we show that the mass ratio and spin of GW190412 are consistent with a binary black hole whose primary component has undergone two successive mergers from a population of black… 
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