Gravitational Wave Bursts from Collisions of Primordial Black Holes in Clusters

Understand

The rate of gravitational wave bursts from the mergers of massive primordial black holes in clusters is calculated.

• Such clusters of black holes can be formed through phase transitions in the early Universe.
• The central black holes in clusters can serve as the seeds of supermassive black holes in galactic nuclei.
• The expected burst detection rate by the LISA gravitational wave detector is estimated.