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  On the Relations Between Field Equations and Equations of Motion in Newtonian and Einsteinian Gravity

Ehlers, J. (2008). On the Relations Between Field Equations and Equations of Motion in Newtonian and Einsteinian Gravity. Acta Physica Polonica B Proceedings Supplement, 39(1), 123-131.

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 Creators:
Ehlers, Jürgen1, Author
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1Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24012              

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 Abstract: A pseudo-field theoretic reformulation of the Newton--Euler dynamics of isolated, gravitating fluids is given. The basic equations of that theory are shown to be regular limits of Einstein's gravitational field equation. It is reviewed how the equations of motion for mass points can be obtained as approximations from those for extended bodies without use of a regularisation to remove infinities. Finally Einstein's (1916--1918) approximation method is revived; its similarity to Newtonian theory suggests the possibility of avoiding infinities also in General Relativity.

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 Dates: 2008-01
 Publication Status: Issued
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 Identifiers: eDoc: 374024
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Title: Conference on Myron Mathisson, his Life, Work and Influence on Current Research
Place of Event: Stefan Banach Int Math Ctr; Univ Warsaw, Inst Theoret Phys; Polish Acad Sci , Warsaw, Poland
Start-/End Date: 2007-10-18 - 2007-10-20

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Title: Acta Physica Polonica B Proceedings Supplement
Source Genre: Journal
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Pages: - Volume / Issue: 39 (1) Sequence Number: - Start / End Page: 123 - 131 Identifier: ISSN: 1509-5770