Remnant baryon mass in neutron star-black hole mergers: Predictions for binary neutron star mimickers and rapidly spinning black holes

Academic Article


  • Gravitational-wave (GW) and electromagnetic (EM) signals from the merger of a Neutron Star (NS) and a Black Hole (BH) are a highly anticipated discovery in extreme gravity, nuclear-, and astrophysics. We develop a simple formula that distinguishes between merger outcomes and predicts the post-merger remnant mass, validated with 75 simulations. Our formula improves on existing results by describing critical unexplored regimes: comparable masses and higher BH spins. These are important to differentiate NSNS from NSBH mergers, and to infer source physics from EM signals.
  • Authors

  • Foucart, Francois
  • Hinderer, Tanja
  • Nissanke, Samaya
  • Publication Date

  • October 9, 2018
  • Published In

  • Physical Review D  Journal
  • Keywords

  • astro-ph.HE
  • gr-qc
  • Digital Object Identifier (doi)

    Start Page

  • 081501
  • Volume

  • 98
  • Issue

  • 8