Numerical relativity with the conformal field equations

Husa, Sascha

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Numerical relativity with the conformal field equations

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Husa, Sascha
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Husa, S. (2003). Numerical relativity with the conformal field equations. In L. Fernández-Jambrina, & L. M. González-Romero (Eds.), Current Trends in Relativistic Astrophysics: Theoretical, Numerical, Observational (pp. 159-192). Berlin u.a.: Springer.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-5278-3

Abstract

I discuss the conformal approach to the numerical simulation of radiating isolated systems in general relativity. The method is based on conformal compactification and a reformulation of the Einstein equations in terms of rescaled variables, the so-called ''''conformal field equations developed by Friedrich. These equations allow to include ''''infinity on a finite grid, solving regular equations, whose solutions give rise to solutions of the Einstein equations of (vacuum) general relativity. The conformal approach promises certain advantages, in particular with respect to the treatment of radiation extraction and boundary conditions. I will discuss the essential features of the analytical approach to the problem, previous work on the problem -- in particular a code for simulations in 3+1 dimensions, some new results, open problems and strategies for future work