Barry Dalgarno
Originally published on 8 April 2011 under the title The Structure of a Black Hole.
The prevailing view of a black hole is that of a gravitational singularity together with its associated event horizon. A gravitational singularity has been defined as an infinitely small point at the core of a black hole, where the gravitational field is infinitely high. An event horizon is a region where the gravitational distortion of space is so high that nothing (neither matter nor electromagnetic radiation) can escape. Our universe is therefore seen as being populated by a multitude of event horizons, together with a multitude of gravitational singularities.
In this communication, it is suggested that instead of a plurality of black hole cores of infinite density, all event horizons are connected to the same single core. A core not of zero size, but a structure of two halves consisting of matter and antimatter respectively, propagating through two dimensions. Density is extremely high with respect to the two-dimensional propagation plane, as is the strength of the gravitational field exerted by the two halves respectively. However, they are not infinitely high, and so the black hole core cannot be described as a gravitational singularity.