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arXiv · gr-qc/0210019

A Radiation Scalar for Numerical Relativity

Christopher Beetle·Lior M. Burko
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Abstract

This letter describes a scalar curvature invariant for general relativity with a certain, distinctive feature. While many such invariants exist, this one vanishes in regions of space-time which can be said unambiguously to contain no gravitational radiation. In more general regions which incontrovertibly support non-trivial radiation fields, it can be used to extract local, coordinate-independent information partially characterizing that radiation. While a clear, physical interpretation is possible only in such radiation zones, a simple algorithm can be given to extend the definition smoothly to generic regions of space-time.

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BibTeXRIS

Christopher Beetle, Lior M. Burko. 2002-10-05. A Radiation Scalar for Numerical Relativity. https://doi.org/10.1103/physrevlett.89.271101

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