Study on the detectability of gravitational radiation from single-binary encounters between black holes in nuclear star cluster: the case of hyperbolic flybys

Understand

With the release of the third Gravitational-Wave Transient Catalogue (GWTC-3), 90 observations of compact-binary mergers by Virgo and LIGO detectors are confirmed.

• Some of these mergers are suspected to have occurred in star clusters.
• The density of black holes at the cores of these clusters is so high that mergers can occur through a few generations forming increasingly massive black holes.
• These conditions also make it possible for three black holes to interact, most likely via single-binary encounters.