Initial data transients in binary black hole evolutions

Details Initial data transients in binary black hole evolutions Initial data transients in binary black hole evolutions

2011-01-28

arxiv.org/abs/1101.5492v1

Class.Quant.Grav.28:155019,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, 4 figures

Scientific paper

10.1088/0264-9381/28/15/155019

We describe a method for initializing characteristic evolutions of the Einstein equations using a linearized solution corresponding to purely outgoing radiation. This allows for a more consistent application of the characteristic (null cone) techniques for invariantly determining the gravitational radiation content of numerical simulations. In addition, we are able to identify the {\em ingoing} radiation contained in the characteristic initial data, as well as in the initial data of the 3+1 simulation. We find that each component leads to a small but long lasting (several hundred mass scales) transient in the measured outgoing gravitational waves.

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