Energy in Newtonian gravity
General Relativity and Quantum Cosmology
2023-07-26 v2 History and Philosophy of Physics
Abstract
In Newtonian gravity it is a moot question whether energy should be localized in the field or inside matter. An argument from relativity suggests a compromise in which the contribution from the field in vacuum is positive definite. We show that the same compromise is implied by Noether's theorem applied to a variational principle for perfect fluids, if we assume Dirichlet boundary conditions on the potential. We then analyse a thought experiment due to Bondi and McCrea that gives a clean example of inductive energy transfer by gravity. Some history of the problem is included
Keywords
Cite
@article{arxiv.2112.06503,
title = {Energy in Newtonian gravity},
author = {Ingemar Bengtsson and Tobias Eklund},
journal= {arXiv preprint arXiv:2112.06503},
year = {2023}
}
Comments
Version 2 has 18 pages, and was much improved by referees