Numerical simulations of the accretion process in Kerr space-times with arbitrary value of the Kerr parameter

TL;DR

This paper presents numerical simulations of accretion onto Kerr black holes and super-spinars to explore potential violations of the Cosmic Censorship Conjecture through astrophysical observations.

Contribution

It introduces the first numerical simulations of accretion onto super-spinars, objects without an event horizon, to test the limits of the Cosmic Censorship Conjecture.

Findings

Accretion behavior differs significantly between black holes and super-spinars.

Simulations suggest observable signatures that could indicate violations of the Cosmic Censorship Conjecture.

Abstract

According to the Cosmic Censorship Conjecture, all the singularities produced by the collapsing matter must be hidden behind an event horizon. In 4D general relativity, this implies that the final product of the collapse is a Kerr-Newman black hole. Here I consider the possibility that the Cosmic Censorship Conjecture can be violated. I present the results of some numerical simulations of the accretion process onto Kerr black holes (objects with event horizon) and Kerr super-spinars (fast-rotating objects without event horizon). This is a preliminary study to investigate how the Cosmic Censorship Conjecture can be tested by astrophysical observations.