Conveners
Repetitive Penrose process: Block 1
- Arman Tursunov (Max Planck Institute for Radio Astronomy)
Repetitive Penrose process: Block 2
- Arman Tursunov (Max Planck Institute for Radio Astronomy)
We reveal a new structure of black holes previously unexplored in the 20th Century. A black hole with an angular momentum and an angular velocity has a moment of inertia. It is a hidden property of the Kerr metric. When the rotation stops in an energy extraction process, there is an irreducible moment of inertia due to the irreducible mass of a Kerr black hole. The moment of inertia indicates...
We consider repetitive decays in the ergosphere of an initially extreme Kerr BH and show that these processes are highly irreversible. For each decay, including the BH capture of the particle falling into the horizon, the increase of the irreducible mass is much larger than the extracted energy. By considering the decay at different points within the ergosphere, we conclude that the repetitive...
If two particles move towards a black hole and collide in the vicinity of the horizon, under certain conditions their energy Ec.m. in the center of mass frame can grow unbounded. This is the Banados-Silk-West (BSW) effect. Usually, this effect is considered for extremal horizons and geodesic (or electrogedesic) trajectories. We study this effect in a more general context, when both geometric...
