Publication date: Apr 2013
Abstract:
Kerr naked singularities (superspinars) have to be efficiently converted
to a black hole due to accretion from Keplerian discs. In the final
stages of the conversion process the near-extreme Kerr naked
singularities (superspinars) provide a variety of extraordinary physical
phenomena. Such superspinning Kerr geometries can serve as an efficient
accelerator for extremely high-energy collisions enabling direct and
clear demonstration of the outcomes of the collision processes. We shall
discuss the efficiency and visibility of the ultra-high-energy
collisions in the deepest parts of the gravitational well of
superspinning near-extreme Kerr geometries for the whole variety of
particles freely falling from infinity. We demonstrate that the ultra-
high-energy processes can be obtained with no fine tuning of the motion
constants and the products of the collision can escape to infinity with
both directional and energetical efficiency significantly higher than in
the case of the near-extreme black holes. The strongest efficiency of
the collision process is reached for particles falling along
trajectories with maximally acceptable negative angular momentum.
Authors:
Stuchlík, Zdeněk; Schee, Jan;