Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 28, Issue 15, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/28/15/155019
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Funding
- National Research Foundation, South Africa
- Bundesministerium fur Bildung und Forschung
- National Science Foundation [AST-0855535, OCI-0905046]
- C D Ott
- Spanish Ministry of Science [CSD2007-00042, FPA-2007-60220]
- NSF MRI [PHY-0960291]
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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 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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