The Implications of High Black Hole Spins for the Origin of Binary Black Hole Mergers

  title={The Implications of High Black Hole Spins for the Origin of Binary Black Hole Mergers},
  author={Aleksandra Olejak and K. Belczynski},
  journal={The Astrophysical Journal Letters},
The LIGO–Virgo collaboration has reported 50 black hole–black hole (BH–BH) mergers and 8 candidates recovered from digging deeper into the detector noise. The majority of these mergers have low effective spins pointing toward low BH spins and efficient angular momentum (AM) transport in massive stars as proposed by several models (e.g., the Tayler–Spruit dynamo). However, out of these 58 mergers, 7 are consistent with having high effective-spin parameter (χ eff > 0.3). Additionally, two events… 


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