The Newman-Penrose quantities and the double-series approximation method

Details The Newman-Penrose quantities and the double-series approximation method The Newman-Penrose quantities and the double-series approximation method

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cqgra..18..233b&link_type=abstract

Classical and Quantum Gravity, Volume 18, Issue 2, pp. 233-241 (2001).

Physics

1

Scientific paper

The double-series method is used to investigate the Newman-Penrose quantities (NPQ) in the case of an axially symmetric isolated source which oscillates for a finite time. In this case there is a single NPQ. It is found that in part of spacetime this quantity is not defined because of the divergence of the Bondi-Sachs expansion used to derive it. The NPQ is conserved where it is defined, but I argue that the conservation has little physical importance.

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