Recoil Velocity of Binary Neutron Star Merger Remnants

• DOI: 10.1017/s1743921322002022
• Publication Date: 2023-02-27T11:25:27Z
• Authors: Sumeet Kulkarni; Surendra Padamata; Anuradha Gupta
• Keywords: Kilonova; Recoil; Black hole (networking)

The LIGO-Virgo gravitational wave detectors have confidently observed 4 events involving neutron stars: two binary star (BNS) mergers (GW170817 and GW190425), star-black hole (GW200105 GW200115). However, our theoretical understanding of the remnant properties such systems is incomplete due to complexities related modeling matter effects very high computational cost corresponding numerical relativity simulations. An important property recoil velocity, which imparted onto anisotropic emission radiation dynamical ejection in kilonova. In this work, we combine as well ejecta distributions, computed by Computational Relativity simulations, get accurate estimates for BNS velocities. We find that recoils dominate those caused emission. Knowledge velocities determining if retained its environment future hierarchical which, turn, can form binaries with black holes so-called lower mass gap 3 5 solar masses.