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Self force from equivalent periodic sources

Considering the self force and radiation due to a small body in orbit (especially aperiodic) around a black hole, this paper defines a decomposition of the source into a sum over the shape preserving periodic motions of extended objects defined here consisting of ensembles of freely falling point particles. The stationary component is found to be within the conservative sector. Self-force computation throughout a specified trajectory reduces to solving one spatial partial differential equation (PDE) and a series of PDE's with periodic time. Regularization is alleviated due to the sources' extended nature. A regularization method is suggested inspired by the type present in electrostatics with surface or other singular sources.

preprint2013arXivOpen access
Barak Kol
gr-qc
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Barak Kol

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