Integration of inhomogeneous cosmological spacetimes in the BSSN formalism

Abstract

We present cosmological-scale numerical simulations of an evolving universe in full general relativity (GR) and introduce a new numerical tool, {\sc CosmoGRaPH}, which employs the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) formalism on a 3-dimensional grid. Using {\sc CosmoGRaPH}, we calculate the effect of an inhomogeneous matter distribution on the evolution of a spacetime. We also present the results of a set of standard stability tests to demonstrate the robustness of our simulations.

Updated to match published version

References in corpus (3)

• Departures from the FLRW Cosmological Model in an Inhomogeneous Universe: A Numerical Examination
• Analytical Representation of a Black Hole Puncture Solution
• Implementation of standard testbeds for numerical relativity

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