Backreaction in Numerical Relativity: Averaging on Newtonian gauge-like hypersurfaces in Einstein Toolkit cosmological simulations

A Oestreicher, SM Koksbang - arXiv preprint arXiv:2408.03049, 2024 - arxiv.org
We introduce a spatial averaging scheme and use it to study the evolution of spatial
averages in large-scale simulations of cosmological structure formation performed with the …

Cosmology using numerical relativity

JC Aurrekoetxea, K Clough, EA Lim - arXiv preprint arXiv:2409.01939, 2024 - arxiv.org
This review is an up-to-date account of the use of numerical relativity to study dynamical,
strong-gravity environments in a cosmological context. First, we provide a gentle introduction …