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Abstract: It is highly plausible that the region of space-time far from an isolatedgravitating body is, in some sense, asymptotically Minkowskian. Howevertheoretical studies of the full nonlinear theory, initiated by Bondi et al.1962, Sachs 1962 and Newman and Unti 1962, rely on careful, clever,a-priori choices of chart and tetrad and so are not readily accessible to thenumerical relativist, who chooses her-his chart on the basis of quite differentgrounds. This paper seeks to close this gap. Starting from data available in atypical numerical evolution, we construct a chart and tetrad which is,asymptotically, sufficiently close to the theoretical ones, so that the keyconcepts of Bondi news function, Bondi mass and its rate of decrease can beestimated. In particular these esimates can be expressed in the numericalrelativist-s chart as numerical relativity recipes.



Author: E. Deadman, J. M. Stewart

Source: https://arxiv.org/







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