Mixed analytic-numerical solutions for a simple radiating system.

Details Mixed analytic-numerical solutions for a simple radiating system. Mixed analytic-numerical solutions for a simple radiating system.

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gregr..19..563a&link_type=abstract

General Relativity and Gravitation, Volume 19, Issue 6, pp.563-580

Computer Science

6

General Relativity:Gravitational Radiation, Gravitational Radiation:General Relativity

Scientific paper

A procedure is presented for dealing with “fast” radiating systems. It employs a method of matching a numerical solution in the source region to an analytic solution in the outer region. As a test of its effectiveness it is applied to a simple radiating system composed of a nonrelativistic harmonic oscillator coupled to a spherically symmetric scalar field. The effects of radiation damping on the oscillator are readily calculated and agree with the exact analytic predictions that one can derive. The accuracy of the “monopole formula” is checked and shown to fail in the fast-motion regime. It is also shown that the asymptotic damping of the system is independent of the initial conditions as long as the total energy is positive and constant. An instability of the system is also discussed.

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