Gravitational waves from dark matter collapse in a star

Understand

We investigate the collapse of clusters of weakly interacting massive particles (WIMPs) in the core of a Sun-like star and the possible formation of mini-black holes and the emission of gravitational waves.

• When the number of WIMPs is small, thermal pressure balances the WIMP cluster's self gravity.
• If the number of WIMPs is larger than a critical number, thermal pressure cannot balance gravity and the cluster contracts.
• If WIMPs are collisionless and bosonic, the cluster collapses directly to form a mini-black hole.