First and second-generation black hole and neutron star mergers in 2+2 quadruples: population statistics

  title={First and second-generation black hole and neutron star mergers in 2+2 quadruples: population statistics},
  author={Adrian S Hamers and Giacomo Fragione and P. Neunteufel and Bence Kocsis},
  journal={Monthly Notices of the Royal Astronomical Society},
Recent detections of gravitational waves from mergers of neutron stars (NSs) and black holes (BHs) in the low and high-end mass gap regimes pose a puzzle to standard stellar and binary evolution theory. Mass-gap mergers may originate from successive mergers in hierarchical systems such as quadruples. Here, we consider repeated mergers of NSs and BHs in stellar 2+2 quadruple systems, in which secular evolution can accelerate the merger of one of the inner binaries. Subsequently, the merger… Expand
Hierarchical mergers of stellar-mass black holes and their gravitational-wave signatures
We review theoretical findings, astrophysical modeling, and current gravitational-wave evidence of hierarchical stellar-mass black-hole mergers. While most of the compact binary mergers detected byExpand
Formation of the First Two Black Hole–Neutron Star Mergers (GW200115 and GW200105) from Isolated Binary Evolution
In this work we study the formation of the first two black hole–neutron star (BHNS) mergers detected in gravitational waves (GW200115 and GW200105) from massive stars in wide isolated binaryExpand
Rates of Compact Object Coalescences
Gravitational-wave detections are enabling measurements of the rate of coalescences of binaries composed of two compact objects – neutron stars and/or black holes. The coalescence rate of binariesExpand


The Lidov-Kozai Effect - Applications in Exoplanet Research and Dynamical Astronomy
The first € price and the £ and $ price are net prices, subject to local VAT. Prices indicated with * include VAT for books; the €(D) includes 7% for Germany, the €(A) includes 10% for Austria.Expand