Radiative gravitational collapse to spherical, toroidal and higher genus black holes

TL;DR

This paper develops models of gravitational collapse from FLRW spacetimes to various topological black holes with negative cosmological constant, analyzing the formation of trapped surfaces and the resulting black hole geometries.

Contribution

It derives matching conditions between FLRW and generalized Vaidya spacetimes and constructs new collapse models leading to asymptotically AdS black holes with diverse topologies.

Findings

Collapse models produce black holes with spherical, toroidal, and higher genus topologies.

Trapped surface formation is analyzed for different collapse scenarios.

Models incorporate electromagnetic radiation in the exterior spacetime.

Abstract

We derive the matching conditions between FLRW and generalised Vaidya spacetimes with spherical, planar or hyperbolic symmetry, across timelike hypersurfaces. We then construct new models of gravitational collapse of FLRW spacetimes with a negative cosmological constant having electromagnetic radiation in the exterior. The final state of the collapse are asymptotically AdS black holes with spherical, toroidal or higher genus topologies. We analyse the collapse dynamics including trapped surface formation, for various examples.