Estimating total momentum at finite distances
General Relativity and Quantum Cosmology
2008-11-26 v2
Abstract
We study the difficulties associated with the evaluation of the total Bondi momentum at finite distances around the central source of a general (asymptotically flat) spacetime. Since the total momentum is only rigorously defined at future null infinity, both finite distance and gauge effects must be taken into account for a correct computation of this quantity. Our discussion is applicable in general contexts but is particularly relevant in numerically constructed spacetimes for both extracting important physical information and assessing the accuracy of additional quantities.
Keywords
Cite
@article{arxiv.0806.4340,
title = {Estimating total momentum at finite distances},
author = {Emanuel Gallo and Luis Lehner and Osvaldo Moreschi},
journal= {arXiv preprint arXiv:0806.4340},
year = {2008}
}
Comments
10 pages, 1 figure. Typos corrected. Comments added and a new Appendix. To be published in PRD