Speaker
Jessie Durk
(Queen Mary University of London)
Description
Black hole lattices are an interesting subset of inhomogeneous cosmologies. These are exact, fully-relativistic treatments of universes with a discretised matter content. We generalise existing lattices to include a cosmological constant and structure formation. For each new generalisation, we find a common behaviour of tending towards FLRW-like as the number of masses is increased, and for the addition of structures, we investigate the effect of gravitational interaction energies between clustered masses. When intra-cluster energies are taken into account, the discrepancy between the scales of lattice and FLRW cosmologies can be alleviated. We also discuss preliminary results of constructing black hole lattices using a simple scalar-tensor theory of gravity and find several solutions – some that admit sensible cosmologies and others that do not, which may place constraints on particular solutions.
