Approximation methods in gravitational-radiation theory

Details Approximation methods in gravitational-radiation theory Approximation methods in gravitational-radiation theory

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986cajph..64..140w&link_type=abstract

Canadian Journal of Physics (ISSN 0008-4204), vol. 64, Feb. 1986, p. 140-145.

Physics

6

Gravitation Theory, Gravitational Waves, Cosmology, Pulsars, Quadrupoles, Relativity

Scientific paper

The observation of gravitational-radiation damping in the binary pulsar PSR 1913+16 and the ongoing experimental search for gravitational waves of extraterrestrial origin have made the theory of gravitational radiation an active branch of classical general relativity. In calculations of gravitational radiation, approximation methods play a crucial role. The author summarizes recent developments in two areas in which approximations are important: (1) the quadrupole approximation, which determines the energy flux and the radiation reaction forces in weak-field, slow-motion, source-within-the-near-zone systems such as the binary pulsar; and (2) the normal modes of oscillation of black holes, where the Wentzel-Kramers-Brillouin approximation gives accurate estimates of the complex frequencies of the modes.

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