Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-11-13
Class.Quant.Grav.24:2367-2388,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
21 pages, uses iop style files. v2: proved a stronger result for type II backgrounds, added a subsection on remaining gauge fr
Scientific paper
10.1088/0264-9381/24/9/014
The radiation gauges used by Chrzanowski (his IRG/ORG) for metric reconstruction in the Kerr spacetime seem to be over-specified. Their specification consists of five conditions: four, which we treat here as valid gauge conditions, plus an additional condition on the trace of the metric perturbation. In this work, we utilize a newly developed form of the perturbed Einstein equations to establish a condition -- on a particular tetrad component of the stress-energy tensor -- under which the full IRG/ORG can be imposed. Using gauge freedom, we are able to impose the full IRG for Petrov type II and type D backgrounds, using a different tetrad for each case. As a specific example, we work through the process of imposing the IRG in a Schwarzschild background, using a more traditional approach. Implications for metric reconstruction using the Teukolsky curvature perturbations in type D spacetimes are briefly discussed.
Price Larry R.
Shankar Karthik
Whiting Bernard. F.
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